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[:." The leak will empty the tank in "21...

[:." The leak will empty the tank in "21" hours."],[" Two pipes can fill a cistern in "14" hours and "16" hours respectively.The pipes are opened simultaneously and "],[" it is found that due to leakage in the bottom it took "32" minutes more to fill the cister.When the cistern "],[" is full,in what time will the leak empty it? "],[" Work done by the two pipes in "1" hour "=((1)/(14)+(1)/(16))=(15)/(112)" ."]

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