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1. |
A pump can fill a tank with water in 1 hour. Because of a leak, it took \(1\frac{1}{3}\) hours to fill the tank. In how many hours can the leak alone drain all the water of the tank when it is full? |
A. | 2 |
B. | 5 |
C. | 4 |
D. | 1 |
Answer» D. 1 | |