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1. |
A tap can fill the tank in 25 minutes and the other can empty the tank in 50 minutes. If both the tap are opened simultaneously, then the tank will be filled in time? |
A. | 1 hour, 10 minutes |
B. | 50 minutes |
C. | 1 hour, 5 minutes |
D. | 55 minutes |
Answer» C. 1 hour, 5 minutes | |