SOLUTION: Pipe A can fill the swimming pool in 5 hours, and Pipe B can fill the same swimming pool in 7 hours. lf both Pipe A and Pipe B are used to fill the swimming pool at the same ti

Question 1200178: Pipe A can fill the swimming pool in 5 hours,
and Pipe B can fill the same swimming pool in 7 hours.
lf both Pipe A and Pipe B are used to fill the swimming pool at the same time,
how long does it take to fill the pool?
Answer by ikleyn(52832) (Show Source): You can put this solution on YOUR website!
.
Pipe A can fill the swimming pool in 5 hours,
and Pipe B can fill the same swimming pool in 7 hours.
lf both Pipe A and Pipe B are used to fill the swimming pool at the same time,
how long does it take to fill the pool?
~~~~~~~~~~~~~~~

Pipe A fills 1/5 of the swimming pool volume each hour.

Pipe B fills 1/7 of the swimming pool volume each hour.


If both pipes are used at the same time, they fill

     =  =   

of the pool volume each hour.


It means that the two pipes will fill the swimming pool in 

     = 2  hours = 2 hours and 55 minutes.    ANSWER

Solved.

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