Problema Solution
Pipe A fills the pool in 4 hours while pipe B drains it in 8 hours. If both pipes are open, how long will it take to fill the pool?
Answer provided by our tutors
let
x = the hours it takes the pool to fill when both pipes are open
1/4 - 1/8 = 1/x
by solving we find
x = 8 hours
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it takes 8 hour for the pool to fill when both pipes are open.