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1. |
Pipe A can fill a tank in 10 hours. Pipe B can fill the same tank in 12 hours. Pipe C can empty the full tank in 16 hours. All the pipes are opened at 8:00 A.M. and Pipe A and B are closed at 10:00 A.M. After how much time from starting will the tank be empty? |
A. | 4 hours 8 minutes |
B. | 4 hours 30 minutes |
C. | 5 hours 24 minutes |
D. | 5 hours 52 minutes |
Answer» E. | |