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A tap can fill a tank in 15 hours. But due to leakage in the bottom; it is filled in 20 hours. If the tank is full, what amount of time is required to empty it completely.

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A tap can fill a tank in 15 hours. But due to leakage in the bottom; it is filled in 20 hours. If the tank is full, what amount of time is required to empty it completely.






 
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