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1. |
Two pipes X and Y can individually fill a tank in 48 and 72 min respectively. If they are opened simultaneously, how long will it take for the tank to fill? _x005F_x000D_ |
A. | 39.4 min |
B. | 28.8 min |
C. | 24 min |
D. | 60 min |
Answer» C. 24 min | |