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A pipe can fill a cistern in 9 hours. Due to a leak in its bottom, the cistern fills up in 10 hours. If the cistern is full, in how much time will it be emptied by the leak ?
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- 70 hours
- 80 hours
- 90 hours
- 100 hours
- 70 hours
Correct Option: C
From the given question ,
| ∴ Part of the cistern filled by pipe in 1 hour = | ||
| 9 |
| Due to a leakage ,Part of the cistern filled by pipe in 1 hour = | ||
| 10 |
| Part of the tank emptied by the leak in 1 hour = | - | ||
| 9 | 10 |
| Part of the tank emptied by the leak in 1 hour = | = | ||
| 90 | 90 |
∴ Required time = 90 hours
