MCQOPTIONS
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| 1. |
A cistern which could be filled in 9 hours takes one hour more to be filled owing to a leak in its bottom. If the cistern is full, in what time will the leak empty it ? |
| A. | 80 hours |
| B. | 85 hours |
| C. | 90 hours |
| D. | 95 hours |
| Answer» D. 95 hours | |