math word problem on test

Algebra
Tutor: None Selected Time limit: 1 Day

One hose can fill a small swimming pool in 
 minutes. A larger hose can fill the pool in 
 minutes. How long will it take the two hoses to fill the pool working together?
Apr 27th, 2015

ok so we are at 1 full pool by the end of both right?  so we need the rate of both hoses.  well, if I do 1/90 I find out how much is flowing into the pool per minute.  Same with the other where it is 1/35/minute so together, we set up this equation

1/90+1/35=5/126  So 5/126 of the tank is filled per minute.  So now we need how many minutes until we get to 126. SO 126/5 minutes is our answer.


Let me know if you have any questions :)



Apr 27th, 2015

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Apr 27th, 2015
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