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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 8 hours. After how many hours, the remaining part of tank will be filled? |
A. | 26 |
B. | 22 |
C. | 30 |
D. | 28 |
Answer» C. 30 | |