Two pumps together

The first pump will fill the tank itself in 3 hours and the second one in 6 hours. How many hours will the tank be full if both pumps are worked simultaneously?

Correct answer:

t =  2 h

Step-by-step explanation:

t1=3 h t2=6 h t=1/t1+1/t21=1/3+1/61=2 h



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Pumps computation example





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