1.

Acid and water are mixed in a vessel A in the ratio of 5 : 2 and in the vessel B in the ratio 8 : 5. In what proportion should quantities be taken out from the two vessels so as to form a mixture in which the acid and water will be in the ratio of 9 : 4?

A. 7: 2
B. 2: 7
C. 7: 4
D. 2: 3
Answer» C. 7: 4


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