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1. |
A can contains a mixture of two liquids A and B in the ratio 7 : 5. When 9 litres of mixture are drained 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 |
Answer» D. 25 | |