emilynicole2 emilynicole2

22-07-2017
Mathematics

contestada

A pool can be filled by one pipe in 4 hours and by a second pipe in 12 hours. How long will it take using both pipes to fill the pool?

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amirreza688 amirreza688

05-08-2017

1/t=1/4+1/12=(3+1)/12=4/12=1/3
t=3 hour

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