MCQOPTIONS
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| 1. |
3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day? |
| A. | 9 |
| B. | 10 |
| C. | 11 |
| D. | 12 |
| Answer» E. | |