MCQOPTIONS
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| 1. |
Two pipes P and Q can fill the tank alone in 120 and 80 hours respectively. If they are opened together, then in how many hours will the tank be filled? |
| A. | 24 |
| B. | 48 |
| C. | 100 |
| D. | 120 |
| Answer» C. 100 | |