A pipe can fill a cistern in 9 hours. Due to a leak in its bottom. the – InterviewSolution

1.	A pipe can fill a cistern in 9 hours. Due to a leak in its bottom. the cistern fills up in10 hours. If the cistern is full, in how much time will it be emptied by the leak?Hint. work done by the leak in 1 hour-19-10 )-90
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