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A pipe can fill a tank in 4 hours, but due to a leak in the tank, it is filled in 5 hours. If the tank is full, how much time will the leak take to empty the tank completely?
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- 10 hours
- 15 hours
- 20 hours
- 12 hours
- 10 hours
Correct Option: C
As per the given in question ,
| In 1 hour, water filled = | th of the tank. | |
| 4 |
| th is emptied by leakage in 5 hours. Full tank would be emptied in 20 hours (i.e. 5 × 4). | ||
| 4 |
Using the given formula ,
Here , a = 5 , b = 4
| Required time ( t ) = | ||
| a - 4 |
| Required time = | = 20 hours | |
| 5 - 4 |
