Lyrics ❤️ Lehraake balkhake....... Lehraake balkhake Balkhake lehraake... Aag lagaa ke Dilo ko jalaa k Karun main isharaa... Sharara sharara Sharara sharara Sharara sharara Main hun ik sharara... Sharara sharara Sharara sharara Sharara sharara Main hun ik sharara .... Sholaa hai ye tan mera Are Dekho Tum Paas naa aana Shamma ke Jo paas ayaya Are jaltaa hai vo hi parvanaa Ho... Mere diwano Baat ko samjho Dur se Dekho Mera ye nazaara Sharara sharara Sharara sharara Sharara sharara Main hun ik shararara.. Sharara sharara Sharara sharara Sharara sharara Main hun ik sharara... Bijli banke girti hun Main naagin banke Dasti hun... Chhine hosh jo sabke... Main hi vo aisi masti hun Ho... Rang chhalka dun Saans mehkaa dun Pal main chhadkaa dun Main yeh Dil tumhara..... Sharara sharara Sharara sharara Sharara sharara Main hun ik sharara... Sharara sharara Sharara sharara Sharara sharara Main hun ik shararara...... Please Yrr like kardenaa 😘
Folks this..... stay with this vibe which this song gives bringing back the old good bollywood days 😢. Why can't we live with this vibe in 2023?? WHO TOLD YOU TO FORGET PAST???
[15/01, 8:12 PM] Anshuman: Thinking about the Text I. Answer these questions in one or two sentences each. (The paragraph numbers within brackets provide clues to the answers.) Question 1. Why was the ‘holy man’ who gave Santosh’s mother his blessings surprised? (1) Answer: The ‘holy man’ who gave Santosh’s mother his blessings was surprised because Santosh’s grandmother sought that Santosh’s mother be blessed with a daughter. This was quite astonishing for the holy man because people mostly seek blessings for having a son. Question 2. Give an example to show that even as a young girl, Santosh was not ready to accept anything unreasonable. (2) Answer: Even as a young girl, Santosh was not ready to accept anything unreasonable. She was not content with her place in the traditional way of life and began living life on her own terms from the start. While other girls wore traditional Indian dresses, Santosh used to wear shorts. Question 3. Why was Santosh sent to the local school? (3) Answer: Although Santosh’s parents were rich landowners and could have sent her to the best schools, Santosh was sent to the local school because of the prevailing custom in the family. Question 4. When did she leave home for Delhi, and why? (4) Answer: She left home for Delhi when she was sixteen because she wanted to get a proper education. Question 5. Why did Santosh’s parents agree to pay for her schooling in Delhi? What mental qualities of Santosh are brought to light by this incident? (4) Answer: Santosh’s parents agreed to pay for her schooling in Delhi when she informed them about her plans to earn money by working part-time to pay for her education. Through this incident, we get to know that Santosh had a very clear goal of getting properly educated no matter what. II. Answer each of these questions in a short paragraph (about 30 words) Question 1. How did Santosh begin to climb mountains? Answer: Kasturba Hostel, where Santosh used to stay during her college days, faced Aravalli Hills. She used to watch the villagers go up the hill and vanish after a while. She decided to check out the mountains herself. She asked the villagers if she could join them, to which they agreed. This is how Santosh began to climb mountains. Question 2. What incidents during the Everest expedition show Santosh’s concern for her team-mates? Answer: During the Everest expedition in 1992, Santosh provided special care to a climber who was dying at the South Col. She could not save him, but she managed to save another climber, Mohan Singh, by sharing her oxygen with him. Question 3. What shows her concern for the environment? Answer: Santosh collected and brought down 500 kilograms of garbage from the Himalayas on her way back from the 1992 Everest expedition. This shows her concern for the environment. Question 4. How does she describe her feelings at the summit of Everest? Answer: She says that it took her some time for the enormity of the moment to sink in. She unfurled the Indian tricolor and held it aloft on the roof of the world. She tells that the feeling is indescribable to watch the Indian flag flying on top of the world. She felt proud as an Indian. Question 5. Santosh Yadav got into the record books both times she scaled Mt Everest. What were the reasons for this? Answer: Santosh Yadav got into the record books both times she scaled Mt Everest. The first time she climbed Mt Everest, she got the record of the youngest woman in the world to achieve the feat. The second time she climbed Mt Everest, she became the only woman to climb Everest twice. III. Complete the following statements. 1. From her room in Kasturba Hostel, Santosh used to _________________. 2. When she finished college, Santosh had to write a letter of apology to her father because _________________. 3. During the Everest expedition, her seniors in the team admired her _________________ while _________________ endeared her to fellow climbers. Answer: 1. From her room in Kasturba Hostel, Santosh used to watch villagers from her room, going up the hill and suddenly vanishing after a while. 2. When she finished college, Santosh had to write a letter of apology to her father because she had got herself enrolled at Uttarkashi without his permission. 3. During the Everest expedition, her seniors in the team admired her climbing skills, physical fitness and mental strength, while her concern for others and desire to work together with them endeared her to fellow climbers. IV. Pick out words from the text that mean the same as the following words or expressions. (Look in the paragraphs indicated.) 1. took to be true without proof (1): 2. based on reason; sensible; reasonable (2): 3. the usual way of doing things (3): 4. a strong desire arising from within (5): 5. the power to endure, without falling ill (7): Answer: 1. took to be true without proof: assumed 2. based on reason; sensible; reasonable: rational 3. the usual way of doing things: custom 4. a strong desire arising from within: urge 5. the power to endure, without falling ill: resistance [15/01, 8:21 PM] ABHIJIT: K
Please, allow me to post the lyrics to practice🙏 Lehra ke balkha ke Hmm, Lehra ke balkha ke Balkha ke lehra ke Aag laga ke, dilon ko jala ke Karoon main ishara Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara Shola hai yeh tann mera Arre dekho tum paas na aana Shamma ke jo paas aaya Arre jalta hai woh hi parvana O, mere deewanon baat ko samjho Door se dekho, mera yeh nazara Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara ra ra ra ra Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara aa Bijli ban ke girti hoon Main nagin ban ke dasti hoon Chheene hosh jo sabke Main hi to aisi masti hoon Ho, rang chhalka doon Saansein mehka doon Pal mein dhadka doon Main yeh dil tumhara Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara aa Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara ra ra ra ra Lehra ke..lehra ke Balkha ke..balkha ke Lehra ke balkha ke Balkha ke lehra ke Aag laga ke, dilon ko jala ke Karoon main ishara Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara Sharara sharara, sharara sharara, Sharara sharara, main hoon ik sharara... Namaste🙏
i) Radius of sphere, r = diameter/2 = 14/2 cm = 7 cm Formula for Surface area of sphere = 4πr2 = 4×(22/7)×72 = 616 Surface area of the sphere is 616 cm2 (ii) Radius (r) of the sphere = 21/2 = 10.5 cm Surface area of a sphere = 4πr2 = 4×(22/7)×10.52 = 1386 Surface area of the sphere is 1386 cm2 Therefore, the surface area of a sphere having diameter 21cm is 1386 cm2 (iii) Radius(r) of sphere = 3.5/2 = 1.75 cm Surface area of a sphere = 4πr2 = 4×(22/7)×1.752 = 38.5 Surface area of the sphere is 38.5 cm2 3. Find the total surface area of a hemisphere of radius 10 cm. [Use π=3.14] Solution: Radius of the hemisphere, r = 10cm Formula: Total surface area of hemisphere = 3πr2 = 3×3.14×102 = 942 The total surface area of the given hemisphere is 942 cm2. 4. The radius of a spherical balloon increases from 7cm to 14cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases. Solution: Let r1 and r2 be the radii of the spherical balloon and spherical balloon when air is pumped into it, respectively. So, r1 = 7cm r2 = 14 cm Now, required ratio = (initial surface area)/(Surface area after pumping air into balloon) = 4πr12/4πr22 = (r1/r2)2 = (7/14)2 = (1/2)2 = ¼ Therefore, the ratio between the surface areas is 1:4. 5. A hemispherical bowl made of brass has inner diameter 10.5cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100 cm2. (Assume π = 22/7) Solution: Inner radius of hemispherical bowl, say r = diameter/2 = (10.5)/2 cm = 5.25 cm Formula for Surface area of hemispherical bowl = 2πr2 = 2×(22/7)×(5.25)2 = 173.25 Surface area of hemispherical bowl is 173.25 cm2 Cost of tin-plating 100 cm2 area = Rs 16 Cost of tin-plating 1 cm2 area = Rs 16 /100 Cost of tin-plating 173.25 cm2 area = Rs. (16×173.25)/100 = Rs 27.72 Therefore, the cost of tin-plating the inner side of the hemispherical bowl at the rate of Rs 16 per 100 cm2 is Rs 27.72. 6. Find the radius of a sphere whose surface area is 154 cm2. (Assume π = 22/7) Solution: Let the radius of the sphere be r. Surface area of sphere = 154 (given) Now, 4πr2 = 154 r2 = (154×7)/(4×22) = (49/4) r = (7/2) = 3.5 The radius of the sphere is 3.5 cm. 7. The diameter of the moon is approximately one fourth of the diameter of the earth. Find the ratio of their surface areas. Solution: If the diameter of the earth is d, then the diameter of the moon will be d/4 (as per the given statement) Radius of earth = d/2 Radius of moon = ½×d/4 = d/8 Surface area of moon = 4π(d/8)2 Surface area of earth = 4π(d/2)2  The ratio between their surface areas is 1:16. 8. A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5cm. Find the outer curved surface of the bowl. (Assume π =22/7) Solution: Given: Inner radius of hemispherical bowl = 5cm Thickness of the bowl = 0.25 cm Outer radius of hemispherical bowl = (5+0.25) cm = 5.25 cm Formula for outer CSA of hemispherical bowl = 2πr2, where r is the radius of the hemisphere = 2×(22/7)×(5.25)2 = 173.25 cm2 Therefore, the outer curved surface area of the bowl is 173.25 cm2. 9. A right circular cylinder just encloses a sphere of radius r (see fig. 13.22). Find (i) surface area of the sphere, (ii) curved surface area of the cylinder, (iii) ratio of the areas obtained in(i) and (ii).  Solution: (i) Surface area of sphere = 4πr2, where r is the radius of sphere (ii) Height of cylinder, h = r+r =2r Radius of cylinder = r CSA of cylinder formula = 2πrh = 2πr(2r) (using value of h) = 4πr2 (iii) Ratio between areas = (Surface area of sphere)/(CSA of Cylinder) = 4πr2/4πr2 = 1/1 Ratio of the areas obtained in (i) and (ii) is 1:1. Exercise 13.4 of Class 9 Maths involves application-level real-time problems that help students to think and apply the relevant formula. It helps to apply the total surface area of a sphere and hemisphere. Learn the NCERT Solutions of Class 9 Maths Chapter 13 along with other learning materials and notes provided by BYJU’S. The problems are solved in a detailed way with relevant formulas and figures to score well in the CBSE exams. Key Features of NCERT Solutions for Class 9 Maths Chapter 13 - Surface Areas and Volume Exercise 13.4 These NCERT Solutions help you solve and revise all questions of Exercise 13.4.Helps to find the radius of a sphere and the total surface area of a hemisphere.It follows NCERT guidelines which help in preparing the students accordingly.Stepwise solutions given by our subject expert teachers will help you to secure more marks.
इससे और अधिक क्या कुछ खूबसूरत हो सकता है? दर्शायी गई पवित्र वादियाँ, शरारत से भारी सहेली और ऊपर से निःस्वार्थ भाव से अपने प्रेमी के बेटे को प्रेम करती प्रेमिका। ❣️☮️
Lyrics ❤️
Lehraake balkhake.......
Lehraake balkhake
Balkhake lehraake...
Aag lagaa ke
Dilo ko jalaa k
Karun main isharaa...
Sharara sharara
Sharara sharara
Sharara sharara
Main hun ik sharara...
Sharara sharara
Sharara sharara
Sharara sharara
Main hun ik sharara ....
Sholaa hai ye tan mera
Are Dekho Tum
Paas naa aana
Shamma ke Jo paas ayaya
Are jaltaa hai vo hi parvanaa
Ho... Mere diwano
Baat ko samjho
Dur se Dekho
Mera ye nazaara
Sharara sharara
Sharara sharara
Sharara sharara
Main hun ik shararara..
Sharara sharara
Sharara sharara
Sharara sharara
Main hun ik sharara...
Bijli banke girti hun
Main naagin banke
Dasti hun...
Chhine hosh jo sabke...
Main hi vo aisi masti hun
Ho... Rang chhalka dun
Saans mehkaa dun
Pal main chhadkaa dun
Main yeh Dil tumhara.....
Sharara sharara
Sharara sharara
Sharara sharara
Main hun ik sharara...
Sharara sharara
Sharara sharara
Sharara sharara
Main hun ik shararara......
Please Yrr like kardenaa 😘
itanee mehanat kyon kee?🐸
@@ahamedrashmi4537 google se download karke hindi me translate kar diya hoga🙃
@@subhojeetmukherjee1037 accha🤓
Kya jaraut thi hum sun sakte hai tum itni mehant mat karoo
0:59 v bb mj. Binvbb am v b TV. Niv
Dil garden garden hora h🔥👀😄🙌
😂🤓
frrrrrrrrrrr
achaa fir kb aau 😮
Ao jada ana hai tujhe 😡 @@monuchaudhary2276
same😅
Feeling confident 😄after listening this masterpiece
P2wwrf😊
@@r.geditingzone9675 nnn
confident for what?
Yes😊
This song deserves trillion and trillion views likes and comments ❤️
Old is gold 🥵❤
👍
But present is diamond
Explain: This song good but slowed best😘
Can I have your insta I'd if you don't mind 🙂
@@tasmiajahannira195yah dance 🕺🕺
@@aanchalgupta2652gajab pfp❤
Aaye hayee hayeee perfect for lofi playlist
haayee haayee hoyee hoyee bado badi bado badi akhhe ladi bado badi
😂😂
Dil khush ho gaya mera 😍✨💫
🤪😇
Old is gold!!! 🧡
Yes old is gold 🧡🧡🧡
Right
BUT PRESENT IS DIMOND..!
Ess song se pyaar ho gya ...🙃🖤voice✨👀
Ghhddg😢❤🎉
🤭
song sᴇ ʏᴀ ʟᴀʀᴋɪ sᴇ😊
This Hits Different🌚❤️🔥
Old is gold ❤❤😊😊
It's vibe differently... 💗🤧
ooo yaaaa
Best slowed and reverb I ever heard 🔥🎧🖤
❤
DIFFERENT VIBE 🔥🔥
Master piece ❤🔥💯
Ohh goddd 🤧🎀✨️
after hear this song =aisa lag ra hai dil garden garden ho rha h🫀🫀
😅
This hits better than my fathers belt🥵🖤
😂😂😂
🤣 🤣 🤣 Nice one
😂😂😂
😅😅😅😅
😂😂😂😂😂😂😂😂😂
VIBES ❤🌍😍🦋❤️🩹🥀 2022 KI 🖤🖇️🥀🎧✨ 11:43 11 JANUARY
Masterpiece
Bollywood 90s era is another level
Aayeeeeeee.......!!!😩💖
This song hits different..... 🥵🥵
DANCING.......WITH IT'S VIBE.....FRONT OF MY MOM.....😂😂.....BUT LOVED IT.........❤❤
Me too just with jhadu 🤡
@@Bhumi-2009 🤡
@@realmohitjangir 😂
@@Bhumi-2009 💀didi
Ughh!😩🔥
Mee badly connected with this one❤️🌝👻😻🙈💞💥🔥🔥
Song is very nice ❤❤❤
Hit 🥵🖤
beautiful ❤❤
Ufff music 🥵😎
I am in Love with this song 😘😘
Ashiah Yadav ji 😢❤ 2:09 💕
1:56 my fav
😇
Amro 😊
Same same
My breakup but I am not listening sad song 😂😂😂 😢😢😢😢 wese ak ladki ladko ko dhokha ke alawa aur kya de sakte hain
Old is gold.. ❤
Folks this..... stay with this vibe which this song gives bringing back the old good bollywood days 😢. Why can't we live with this vibe in 2023?? WHO TOLD YOU TO FORGET PAST???
I like this song ❤❤
Old is gold...💥🥵✨
2:28 is just 🥀🔥💗✨
This bass 🥵🥶😬
0:40 video gana bahut achcha nikaliye
And old is gold ❤❤
Fav song bruh😭💓
now my favourite song is this .. I will not forgot this song 🥰
,,,, l
Lovely😍
This song is gave me totally another level feeling ❤just woowwwww
Hits harder than lighting
Not bad song 😃😀nice song
Old songs is gold ....❤🎧
This lovli song 🥰🥰🥰🥰
Mi gf favarit song🙈🥰🥰
Uhuuuu vibe hai bhaii
Life line song 😋😋
Edit karne wale ko 7 puston ki salaami🥵🥵🥵🥵🥵🥵🥵🥵
noooooooooooo...........................................
Dear stranges.... Congrats we have osm taste of music 🤞❣️💫
Music mast hai❤❤
[15/01, 8:12 PM] Anshuman: Thinking about the Text
I. Answer these questions in one or two sentences each. (The paragraph numbers within brackets provide clues to the answers.)
Question 1. Why was the ‘holy man’ who gave Santosh’s mother his blessings surprised? (1)
Answer: The ‘holy man’ who gave Santosh’s mother his blessings was surprised because Santosh’s grandmother sought that Santosh’s mother be blessed with a daughter. This was quite astonishing for the holy man because people mostly seek blessings for having a son.
Question 2. Give an example to show that even as a young girl, Santosh was not ready to accept anything unreasonable. (2)
Answer: Even as a young girl, Santosh was not ready to accept anything unreasonable. She was not content with her place in the traditional way of life and began living life on her own terms from the start. While other girls wore traditional Indian dresses, Santosh used to wear shorts.
Question 3. Why was Santosh sent to the local school? (3)
Answer: Although Santosh’s parents were rich landowners and could have sent her to the best schools, Santosh was sent to the local school because of the prevailing custom in the family.
Question 4. When did she leave home for Delhi, and why? (4)
Answer: She left home for Delhi when she was sixteen because she wanted to get a proper education.
Question 5. Why did Santosh’s parents agree to pay for her schooling in Delhi? What mental qualities of Santosh are brought to light by this incident? (4)
Answer: Santosh’s parents agreed to pay for her schooling in Delhi when she informed them about her plans to earn money by working part-time to pay for her education.
Through this incident, we get to know that Santosh had a very clear goal of getting properly educated no matter what.
II. Answer each of these questions in a short paragraph (about 30 words)
Question 1. How did Santosh begin to climb mountains?
Answer: Kasturba Hostel, where Santosh used to stay during her college days, faced Aravalli Hills. She used to watch the villagers go up the hill and vanish after a while. She decided to check out the mountains herself. She asked the villagers if she could join them, to which they agreed. This is how Santosh began to climb mountains.
Question 2. What incidents during the Everest expedition show Santosh’s concern for her team-mates?
Answer: During the Everest expedition in 1992, Santosh provided special care to a climber who was dying at the South Col. She could not save him, but she managed to save another climber, Mohan Singh, by sharing her oxygen with him.
Question 3. What shows her concern for the environment?
Answer: Santosh collected and brought down 500 kilograms of garbage from the Himalayas on her way back from the 1992 Everest expedition. This shows her concern for the environment.
Question 4. How does she describe her feelings at the summit of Everest?
Answer: She says that it took her some time for the enormity of the moment to sink in. She unfurled the Indian tricolor and held it aloft on the roof of the world.
She tells that the feeling is indescribable to watch the Indian flag flying on top of the world. She felt proud as an Indian.
Question 5. Santosh Yadav got into the record books both times she scaled Mt Everest. What were the reasons for this?
Answer: Santosh Yadav got into the record books both times she scaled Mt Everest. The first time she climbed Mt Everest, she got the record of the youngest woman in the world to achieve the feat. The second time she climbed Mt Everest, she became the only woman to climb Everest twice.
III. Complete the following statements.
1. From her room in Kasturba Hostel, Santosh used to _________________.
2. When she finished college, Santosh had to write a letter of apology to her father because _________________.
3. During the Everest expedition, her seniors in the team admired her _________________ while _________________ endeared her to fellow climbers.
Answer:
1. From her room in Kasturba Hostel, Santosh used to watch villagers from her room, going up the hill and suddenly vanishing after a while.
2. When she finished college, Santosh had to write a letter of apology to her father because she had got herself enrolled at Uttarkashi without his permission.
3. During the Everest expedition, her seniors in the team admired her climbing skills, physical fitness and mental strength, while her concern for others and desire to work together with them endeared her to fellow climbers.
IV. Pick out words from the text that mean the same as the following words or expressions. (Look in the paragraphs indicated.)
1. took to be true without proof (1):
2. based on reason; sensible; reasonable (2):
3. the usual way of doing things (3):
4. a strong desire arising from within (5):
5. the power to endure, without falling ill (7):
Answer:
1. took to be true without proof: assumed
2. based on reason; sensible; reasonable: rational
3. the usual way of doing things: custom
4. a strong desire arising from within: urge
5. the power to endure, without falling ill: resistance
[15/01, 8:21 PM] ABHIJIT: K
Chapter from 9 class CBSE rigth
kya bkwaas ha bhaii
Wow❤ so nice vibe 😊😊
My favourite song ❤
Super duper hit song
Listen in 1.25× and its perfect 👏👏❤
Isko gana bola ke sukun ❤😊😊
No words the amazing voice of this singer😢😢😢😢😢😢😚😚😚😚😚😚😩😩😩😩😩
Very nice song
Nice song ❤❤❤❤❤❤
O ho yaar 🥵🍃
Dilon ko jala ke karu main ishara🤭🤭💜💜💜💜
It gives a classic feel😁
Please, allow me to post the lyrics to practice🙏
Lehra ke balkha ke
Hmm,
Lehra ke balkha ke
Balkha ke lehra ke
Aag laga ke, dilon ko jala ke
Karoon main ishara
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara
Shola hai yeh tann mera
Arre dekho tum paas na aana
Shamma ke jo paas aaya
Arre jalta hai woh hi parvana
O, mere deewanon baat ko samjho
Door se dekho, mera yeh nazara
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara ra ra ra ra
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara aa
Bijli ban ke girti hoon
Main nagin ban ke dasti hoon
Chheene hosh jo sabke
Main hi to aisi masti hoon
Ho, rang chhalka doon
Saansein mehka doon
Pal mein dhadka doon
Main yeh dil tumhara
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara aa
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara ra ra ra ra
Lehra ke..lehra ke
Balkha ke..balkha ke Lehra ke balkha ke
Balkha ke lehra ke
Aag laga ke, dilon ko jala ke
Karoon main ishara
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara
Sharara sharara, sharara sharara,
Sharara sharara, main hoon ik sharara...
Namaste🙏
Nice song
Just cool.....❤
Sharma ke jo pass aaya ❤🔥🥵
Ufff 😗🔥
Suna k bad acha laga❤
old is gold❤❤❤
Anyone in 2025😂
❤ wov 🔥🖤
Bohat good voice hai ❤
Hyyyyyyy❤
Yaar ye kitna awesome hai
So beautiful 😍😍😍😍
i) Radius of sphere, r = diameter/2 = 14/2 cm = 7 cm
Formula for Surface area of sphere = 4πr2
= 4×(22/7)×72 = 616
Surface area of the sphere is 616 cm2
(ii) Radius (r) of the sphere = 21/2 = 10.5 cm
Surface area of a sphere = 4πr2
= 4×(22/7)×10.52 = 1386
Surface area of the sphere is 1386 cm2
Therefore, the surface area of a sphere having diameter 21cm is 1386 cm2
(iii) Radius(r) of sphere = 3.5/2 = 1.75 cm
Surface area of a sphere = 4πr2
= 4×(22/7)×1.752 = 38.5
Surface area of the sphere is 38.5 cm2
3. Find the total surface area of a hemisphere of radius 10 cm. [Use π=3.14]
Solution:
Radius of the hemisphere, r = 10cm
Formula: Total surface area of hemisphere = 3πr2
= 3×3.14×102 = 942
The total surface area of the given hemisphere is 942 cm2.
4. The radius of a spherical balloon increases from 7cm to 14cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.
Solution:
Let r1 and r2 be the radii of the spherical balloon and spherical balloon when air is pumped into it, respectively. So,
r1 = 7cm
r2 = 14 cm
Now, required ratio = (initial surface area)/(Surface area after pumping air into balloon)
= 4πr12/4πr22
= (r1/r2)2
= (7/14)2 = (1/2)2 = ¼
Therefore, the ratio between the surface areas is 1:4.
5. A hemispherical bowl made of brass has inner diameter 10.5cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100 cm2. (Assume π = 22/7)
Solution:
Inner radius of hemispherical bowl, say r = diameter/2 = (10.5)/2 cm = 5.25 cm
Formula for Surface area of hemispherical bowl = 2πr2
= 2×(22/7)×(5.25)2 = 173.25
Surface area of hemispherical bowl is 173.25 cm2
Cost of tin-plating 100 cm2 area = Rs 16
Cost of tin-plating 1 cm2 area = Rs 16 /100
Cost of tin-plating 173.25 cm2 area = Rs. (16×173.25)/100 = Rs 27.72
Therefore, the cost of tin-plating the inner side of the hemispherical bowl at the rate of Rs 16 per 100 cm2 is Rs 27.72.
6. Find the radius of a sphere whose surface area is 154 cm2. (Assume π = 22/7)
Solution:
Let the radius of the sphere be r.
Surface area of sphere = 154 (given)
Now,
4πr2 = 154
r2 = (154×7)/(4×22) = (49/4)
r = (7/2) = 3.5
The radius of the sphere is 3.5 cm.
7. The diameter of the moon is approximately one fourth of the diameter of the earth.
Find the ratio of their surface areas.
Solution:
If the diameter of the earth is d, then the diameter of the moon will be d/4 (as per the given statement)
Radius of earth = d/2
Radius of moon = ½×d/4 = d/8
Surface area of moon = 4π(d/8)2
Surface area of earth = 4π(d/2)2

The ratio between their surface areas is 1:16.
8. A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5cm. Find the outer curved surface of the bowl. (Assume π =22/7)
Solution:
Given:
Inner radius of hemispherical bowl = 5cm
Thickness of the bowl = 0.25 cm
Outer radius of hemispherical bowl = (5+0.25) cm = 5.25 cm
Formula for outer CSA of hemispherical bowl = 2πr2, where r is the radius of the hemisphere
= 2×(22/7)×(5.25)2 = 173.25 cm2
Therefore, the outer curved surface area of the bowl is 173.25 cm2.
9. A right circular cylinder just encloses a sphere of radius r (see fig. 13.22). Find
(i) surface area of the sphere,
(ii) curved surface area of the cylinder,
(iii) ratio of the areas obtained in(i) and (ii).

Solution:
(i) Surface area of sphere = 4πr2, where r is the radius of sphere
(ii) Height of cylinder, h = r+r =2r
Radius of cylinder = r
CSA of cylinder formula = 2πrh = 2πr(2r) (using value of h)
= 4πr2
(iii) Ratio between areas = (Surface area of sphere)/(CSA of Cylinder)
= 4πr2/4πr2 = 1/1
Ratio of the areas obtained in (i) and (ii) is 1:1.
Exercise 13.4 of Class 9 Maths involves application-level real-time problems that help students to think and apply the relevant formula. It helps to apply the total surface area of a sphere and hemisphere.
Learn the NCERT Solutions of Class 9 Maths Chapter 13 along with other learning materials and notes provided by BYJU’S. The problems are solved in a detailed way with relevant formulas and figures to score well in the CBSE exams.
Key Features of NCERT Solutions for Class 9 Maths Chapter 13 - Surface Areas and Volume Exercise 13.4
These NCERT Solutions help you solve and revise all questions of Exercise 13.4.Helps to find the radius of a sphere and the total surface area of a hemisphere.It follows NCERT guidelines which help in preparing the students accordingly.Stepwise solutions given by our subject expert teachers will help you to secure more marks.
What are song ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
My love😊😊😊😊
My fav song❤❤
Its fabulous
Agun song ta 😊
Better song❤🎉🎉🎉
Very nice song ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
Nice song 😊
Mirror+noice bud 😅😅 = likee celebrity 😅😅 💗🦋🦋
🥵puro fatafati 🤠👅
Cool 😎😎
Wow ❤
इससे और अधिक क्या कुछ खूबसूरत हो सकता है? दर्शायी गई पवित्र वादियाँ, शरारत से भारी सहेली और ऊपर से निःस्वार्थ भाव से अपने प्रेमी के बेटे को प्रेम करती प्रेमिका। ❣️☮️
Nice😊😊
Ufff music🥵🥵
This song is to much.........🎉🎉🎉🎉🎉❤
❤❤❤❤❤❤❤❤❤❤❤❤
Super 🎉
Oye hoye jabe
0:28 Broooo Try this 😄👋
Nice❤
Uffs old is good 😚
Crush 🫠😏