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1. |
8 pipes are required to fill a tank in 2 hours. How long will it take if 5 pipes are used? |
A. | 3 hours 12 minutes |
B. | 3 hours 48 minutes |
C. | 3 hours 4 minutes |
D. | 3 hours 36 minutes |
Answer» B. 3 hours 48 minutes | |