A pipe can fill a cistern in 10 hours. Due to a leak in the bottom it is filled in 12 hours. When the cistern is full, in how much time will it be emptied by the leak?
Given,
A pipe can fill a cistern in = 10 hours
Due to leakage it get filled in = 12 hours
∵ Without leakage work done by pipe in 1 hour = 
∵ With leakage work done by pipe in 1 hour = 
∴ Work done by leakage in 1 hour = 
Hence, the cistern will be emptied by leakage in = 
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