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A can contains a mixture of two liqui...

A can contains a mixture of two liquids `A` and `B` in the ratio 7:5 when 9 litres of mixture are drawn off and the can is filled with `B` , the ratio of `A` and `B` becomes 7:9. How many litres of liquid `A` was contained by the can initially? (a) 10 (b) 20 (c) 21 (d) 25

A

35 L

B

50 L

C

45 L

D

40L

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The correct Answer is:
D
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