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A cistern is normally filled in 8 hours but takes another 2 hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in :
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- 16 hours
- 20 hours
- 25 hours
- 40 hours
- 16 hours
Correct Option: D
According to question , we have
| Part emptied by the leak in 1 hour = | - | = | = | ||||
| 8 | 10 | 40 | 40 |
∴ The leak will empty the cistern in 40 hours.
