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A pipe can fill a tank with water in 3 hours. Due to leakage in bottom, it takes
3 1 hours to fill it . In what time the leak will empty the fully filled tank ? 2
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- 12 hours
- 21 hours
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6 1 hours 2 -
10 1 hours 2
- 12 hours
Correct Option: B
Let the leak empty the full tank in t hours.
According to question ,
| - | = | |||
| 3 | t | 7 |
| ⇒ | = | - | = | ||||
| t | 3 | 7 | 21 |
| ⇒ | = | ⇒ t = 21 hours | ||
| t | 21 |
