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1. |
Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, whereas pipe C can empty the full tank in 40 hours. All three pipes are opened together, but pipe A is closed after 10 hours. After how many hours will the remaining part of the tank be filled? |
A. | 10 |
B. | 20 |
C. | \(12 \dfrac{1}{2}\) |
D. | \(15 \dfrac{1}{2}\) |
Answer» D. \(15 \dfrac{1}{2}\) | |