a tap fills a tank in 12 hours and other empties it in 14 hours.if both kept opend'in how many hours will the tank be filled?
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Step-by-step explanation:
work done by 1st tap = 1/12 part
work done by 2nd tap= 1/14 part
If both tap are opened, time required to fill the tank = 1/12 - 1/14 = 1/84
=84 hours
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