A tap can fill a tank in 3 hours. A hole in the tank can empty it in 4 hours. How much time is required to fill this tank
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Answer:
21 hrs
Step-by-step explanation:
A's efficiency is 7 units/hr
A's efficiency after leakage 6 units/hr
Leakage efficiency = 7−6=1units/hour
Leakage will empty the fully filled tank:
T.Cefiiciency=211=21hrs
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