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1. |
Q: An electric pump can fill a tank in 3 hours. Because of a leak in the tank, it took 3 ½ hours to fill the tank. The leak can drain out all the water of the tank in…… |
A. | 10 ½ hrs. |
B. | 12 hrs. |
C. | 21 hrs. |
D. | 24 hrs. |
Answer» D. 24 hrs. | |