SOLUTION: using a single hose janet can fill a pool in 7 hours. the same pool can be drained in 8 hours by opening a drainpipe. if janet forgets to close the drainpipe how long would it take

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: using a single hose janet can fill a pool in 7 hours. the same pool can be drained in 8 hours by opening a drainpipe. if janet forgets to close the drainpipe how long would it take      Log On


   

Question 971769: using a single hose janet can fill a pool in 7 hours. the same pool can be drained in 8 hours by opening a drainpipe. if janet forgets to close the drainpipe how long would it take her to fill the pool.
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
using a single hose janet can fill a pool in 7 hours. the same pool can be drained in 8 hours by opening a drainpipe.
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let x=amt of time it would take to fill the pool.
1/7=fill rate
1/8=drain rate
x/7-x/8=1
lcd:7*8=56
8x-7x=56
x=56
if janet forgets to close the drainpipe how long would it take her to fill the pool. 56 hrs