Latest Book Aptitude Question SOLUTION: A container contains a mixture of two liquids P and Q in the ratio 7 : 5. When 9 litres of mixture are drawn off and the container is filled with Q, the ratio of P and Q becomes 7

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(#M40021172) BOOK question Keep an EYE

A container contains a mixture of two liquids P and Q in the ratio 7 : 5. When 9 litres of mixture are drawn off and the container is filled with Q, the ratio of P and Q becomes 7 : 9. How many litres of liquid P was contained in the container initially?

Asked In Book Abhishek (11 years ago)

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pankaj yadav  (7 years ago)

Suppose the can initially contains 7X and 5X of mixtures A and B respectively.

Quantity of A in mixture left =7X - 7/12 x 9 litres = 7X - 21/4 litres.

Quantity of B in mixture left = 5X - 5/12 x 9 litres = 5X - 15/4 litres.


=> 7X - 21/4 / 5X - 15/4 = 7/9
=> 252X - 189 = 140X + 147
=> X = 3.
i.e 7X = 7x3

So, the can contained 21 litres of A.

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