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Homework answer is option (A) 10 litres.... Solution:- Alcohol: water 4:3 '; let 4x:3x Now, 5 litres of water is added. So,,4x÷3x+5=4/5 20x=12x+20 8×=20 X=20/8 X=5/2 And now,,4×5/2=10 LITRES
The question from 34:00 can be easily done by just finding the ratio of the options given . I’m preparing for 2020 . And this series is so cool and very helping even after a year. Thank you Gopal sir and Vedantu for all your effort 🙏🏻
Sir, In the question a/b=c/d=e/f=3 , can't we take a/b=3/1 , c/d=3/1 and e/f=3/1 . By doing that we will get a=3,b=1,c=3,d=1,e=3,f=1. Sir , I hope that you will respond and clear my doubt.
sir i have an doubt sir question 1 multiplication is wrong 53*53=2809 and 53x-1/53x=52x and how u got (53*53x-x) can u sir please explain me (*=multiplication)
34:59 sir we can firstly check that all the incomes given is in ratio of 3 is to 4.There will be only one answer left that is B so we did not need to take out the answer by solving.......... It is the tip to all my NTSE aspirants....
Ans- 10 liters. Explanation- Given ratio=4:3 Why not let the common multiple( which will be constant) multiple here be x. So, amount of alcohol = 4x............................................(1) and amount of water=3x......................................................(2) 4x/3x=constant=4/3 Acc. to the seccond situation, 5 liter water is added. => vol of water=3x+5 => vol of alcohol=4x ( because no alcohol is added) And, the ratio of vol. of alcohol and water in this situation is given = 4/5 => (4x)/(3x+5)=4/5 ....On cross multiplying..... we get (4x)*5=4*(3x+5) => 20x=12x+20 subtractinng 12x from both sides, we get 20x-12x=12x+20-12x =>8x=20 =>x=20/8.................................................................(3) substituting value of x in 1 , we can get the vol. of alcohol substituting the values, we get Amount of alcohol=4x=4(20/8)=20/2=10 liter. by the way sir........loved this session. hmmmmmm... chalo paani ka maap bhi de deta hun☺ vol. of water=3x=3(20/8)=60/8=7(4/8)=7.5 lit
Now you have the chance to chat with our amazing and energetic teachers DIRECTLY. Our Telegram group - vdnt.in/9n10 is filling FAST. HURRY! Join NOW. To find all the relevant links, check out the description box above!! Access all the Session pdfs and Mock tests, follow - vedantu.app.link/VpVerwhY9U
Sir don't use blue pen on blue board bcoz it is not clearly visible....🙏☺️
Sir: Goal = Goal
We: Goal = Dream = Hobbies = Passion
Homework answer is option (A) 10 litres....
Solution:- Alcohol: water
4:3 '; let 4x:3x
Now, 5 litres of water is added.
So,,4x÷3x+5=4/5
20x=12x+20
8×=20
X=20/8
X=5/2
And now,,4×5/2=10 LITRES
I have a simpler answer -
if change in ratio by 2 means 5 litre
Meaning 1 part is 5/2 and 4 parts alcohol is 10 Litre.
The question from 34:00 can be easily done by just finding the ratio of the options given .
I’m preparing for 2020 . And this series is so cool and very helping even after a year. Thank you Gopal sir and Vedantu for all your effort 🙏🏻
Thank for giving the shortcut method.
Nice 👌👌 Thanks you sir 🙏🙏🙏🙏
Very very thank you sir
Your hardwork will help us to achieve our goals
6:18 lecture starts
Sir,
In the question a/b=c/d=e/f=3 , can't we take a/b=3/1 , c/d=3/1 and e/f=3/1 .
By doing that we will get a=3,b=1,c=3,d=1,e=3,f=1. Sir , I hope that you will respond and clear my doubt.
Actually ..... no
Because it is a ratio.
A could be 6 and B could be 2
So taking a ratio is the only way because A=3B is never wrong.
Please don't use sky color. clearly not visible 😃😃😃😃😃😃😃😃😃
HOME WORK QUESTION's ANSWER IS OPTION ((A)) WHICH IS 10 LITERS...........
17:17 Cancel 53 on both sides Simple thing
Sir if i add water in a mixture then quantity of water and milk will change simultaneously(right or wrong)
My name is shivansh and the answer of the homework question is 10 litres optionA
Homework ans A 10 liter
sir, get well soon😂😁👍
Ans - a) 10 litre
Real name - Rishabh jain
Please mention
Your city
sir i have an doubt
sir question 1 multiplication is wrong 53*53=2809 and 53x-1/53x=52x and how u got (53*53x-x) can u sir please explain me
(*=multiplication)
Because 53x and x are different terms and 53 is multiplied with 53x.
34:59 sir we can firstly check that all the incomes given is in ratio of 3 is to 4.There will be only one answer left that is B so we did not need to take out the answer by solving.......... It is the tip to all my NTSE aspirants....
Yeah even I observed this.
Sir my favorite school is vedantu
Sir i have a boubt in question in which ratio of a and b expenditure is given please tell why we have taken rhs as 1/2
Ans- 10 liters.
Explanation- Given ratio=4:3
Why not let the common multiple( which will be constant) multiple here be x.
So, amount of alcohol = 4x............................................(1)
and amount of water=3x......................................................(2)
4x/3x=constant=4/3
Acc. to the seccond situation, 5 liter water is added.
=> vol of water=3x+5
=> vol of alcohol=4x ( because no alcohol is added)
And, the ratio of vol. of alcohol and water in this situation is given = 4/5
=> (4x)/(3x+5)=4/5
....On cross multiplying.....
we get
(4x)*5=4*(3x+5)
=> 20x=12x+20
subtractinng 12x from both sides, we get
20x-12x=12x+20-12x
=>8x=20
=>x=20/8.................................................................(3)
substituting value of x in 1 , we can get the vol. of alcohol
substituting the values, we get
Amount of alcohol=4x=4(20/8)=20/2=10 liter.
by the way sir........loved this session.
hmmmmmm... chalo paani ka maap bhi de deta hun☺
vol. of water=3x=3(20/8)=60/8=7(4/8)=7.5 lit
Sir the answer of the homework question is 10liters option (A)
Belated answer is 10 liters
Sir homework answer is 10 liters option A
A)10
D is the correct answer
Because quantity of 1st condition has not given
Answer for the homework question is (A)
A is the correct ans....
10 liters....
Answer is option a. 10 liters
A is the correct answer (10 litres)
Homework ans is A) 10 litres
Home work = 10 option A
Answer is option a)10 litres
Answer is 60 liter (d)
homework answer- (A) 10 litres
10 litres ans
Answer of homework questio is 10 litres.
Quantity of alcohol is equal to 10 litre
Sir my ans is 10 l
hw que answer is 10 litres
Answer is option a
Answer is (A )- 10 litres
Option A 10 litres is right answer
Ans is 10 litre
Answer A 10 litres
Very nice video
Answer is A
Ans.h.w.10 l
ANSWER IS 'A' SIR
sir 20 liters will be added
H.W
10 litre is answer
The answer is A 10 litres
Sir the ans is a
Sir i dind get milk and water type question
Not so helpful
39:38 part is not clear to me 😭😭😭
Hw question ans is 10 litres:)
Sir please use dark colour on board
Answer is 10 I am dam sure,......
Answer is a 10 litres
A. 10 l
Don't use the blue cloud pls it adds pressure to eyes or just change the background colour
Sir but if we dont have any dream , we cant persue our goal,,,,,!!!!!
Value of x is 2.5 and alcohol is 10 litres... option a is the correct answer
Sir what is meant by conclusion 🤔🤔🤔🤔
Answer for hw is A(10 L)
Give ntse level
H W ans.A
Option A 10lts
Very easy to honge hi jab itne easy questions h
B is correct
D is correct
ans-10 litres
A is right
C is correct
Answer is a option
4x÷3x+5=4÷5
12x+20=20x
8x=20
X=2.5
So 4x=4×2.5=10👌
A is correct
17:36
53×53 is 2809 instead of it Sir wrote 2709
homework question ans. (A) 10 L
Byius is the best
10 litre
The answer of 53*53=2809 not 2709 question I 17:30
Answer a 10 liters
A 10 l
Sorry B is correct
U r writing in blue board blue marker unable to see clearly
Answer is (c )20 litres
A is correct
10 litre
B is correct
C is correct
B is correct
B is correct