SSC CPO SI and ASI 2016 Paper

Question : 119 of 200

Marks: +1, -0

A can is full of a mixture of two liquids A and B in the ratio of 7 : 5. When 9 litres of the mixture is drawn off from the can and replaced by the same quantity of liquid B, the ratio of A and B in the can becomes 7 : 9. The capacity of the can is

10 litres
20 litres
21 litres
36 litres

Validate

Solution:

(4) Let capacity of the can be

x

litres.
Quantity of A before removal ofmixture

=\ {7 x}/{12}

Quantity of

A

after removal ofmixture =

(x-9) × \ {7}/{12}=x \ × \ {7}/{16}

⇒ 3x=4x-36
⇒ x=36 litres

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