Latest TCS Aptitude Question SOLUTION: From a cask of milk containing 30 litres, 6 litres are drawn out and the cask is filled up with water. If the same process is repeated a second, then a third time, what will be the

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From a cask of milk containing 30 litres, 6 litres are drawn out and the cask is filled up with water. If the same process is repeated a second, then a third time, what will be the number of litres of milk left in the cask?

Asked In TCS Perumalsamy (10 years ago)

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Anindya Sankar Dasgupta  (10 years ago)

15.36L

qntity of milk=x
qntity of water=y
no of times=n

new qntity of milk=x((1-y/x)^n)=30((1-6/30)^3)=15.36L

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sambasiva rao  (10 years ago)

20% of 30 lit = 6 lit
--->in 1st second 30-6=24lit milk, 6lit water
--->in 2nd second 24*(20/100) + 6(20/100)= 4.8+1.2=6 so we have, 19.2 milk and 10.8 water
---> in 3rd time 19.2*20%+10.8*20% = 3.84 + 2.16 after adding water we have 15.36 milk, 14.64 water..

****so answer is 15.36

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alok kumar sharma  (10 years ago)

using formu==30(1-6/30)power 3=15.36 ans

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RAJASHEKAR RUDRARAPU  (10 years ago)

x*(x-a/x)^n
x=30
a=6
n=3
ans:15.36L

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yogan  (10 years ago)

please mention formula

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udhayasakthi  (10 years ago)

15.36 liters

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niket pandey  (10 years ago)

12.29 LITRES..because ratio of milk left is taken into account

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