SOLUTION: One pipe can fill a pool 3 times faster than a second pipe. When both pipes are opened, they fill the pool in 4 hours. How long would it take to fill the pool if only the slower pi

Algebra ->  Rate-of-work-word-problems -> SOLUTION: One pipe can fill a pool 3 times faster than a second pipe. When both pipes are opened, they fill the pool in 4 hours. How long would it take to fill the pool if only the slower pi      Log On


   

Question 1147229: One pipe can fill a pool 3 times faster than a second pipe. When both pipes are opened, they fill the pool in 4 hours. How long would it take to fill the pool if only the slower pipe is used?
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
slow pipe, 1/x
fast pipe, 3/x
pipes together , 1/4

1%2Fx%2B3%2Fx=1%2F4
-
4%2B4%2A3=x
x=16-------------------sixteen hours for the slow pipe if alone