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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 | |