SOLUTION: please help me solve this problem
One pipe can fill a pool two and a half times faster than a second pipe. When both pipes are opened, they fill the pool in 15 hours. How long w
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One pipe can fill a pool two and a half times faster than a second pipe. When both pipes are opened, they fill the pool in 15 hours. How long w
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Question 864348: please help me solve this problem
One pipe can fill a pool two and a half times faster than a second pipe. When both pipes are opened, they fill the pool in 15 hours. How long would it take to fill the pool if only the SLOWER pipe was used? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! rate of filling of small pipe = x
other pipe = 2.5x =2 1/2 x= 5/2 x
Filling the pool is one job
small pipe does 1/x of the job in 1 hour
big pipe does (2/5x) of the job in 1 hour
together they do
(1/x) +(2/5x) of the job in 1 hour
together they do 7/5x of the job in 1 hour but that is =1/15
7/5x=1/15
7*15/5 =x
21=x
small pipe will take 21 hours to fill
