Two pipes A and B can fill a cistern in 15 hours and ’10 hours respe – InterviewSolution

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1.	Two pipes A and B can fill a cistern in 15 hours and ’10 hours respectively. A tape can empty the full cistern in 30 hours. All the three taps were open for 2 hours, when it was remembered that the emptying tap had been left open. It was then closed. How many hours more would it take for the cistern to be filled?
Answer» 4 HR 30 min 1.2 hours 4 hr 24 min 3 hr 35 min Answer :C

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