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Question 550478: Gary Egan needs to drain his 18,000-gallon inground swimming pool to have it resurfaced. He uses 2 pumps to drain the pool. One drains 5 gallons of water a minute while the other drains 25 gallons of water a minute. If the pumps are turned on at the same time and remain on until the pool is drained, bow long wil it take for the pool to be drained?
The time required to drain the water from the pool is ____minutes.
(Type an integer or a decimal.)
Answer by ptaylor(2198)   (Show Source):
You can put this solution on YOUR website! Let t=time required to drain the pool with both pumps working
Together pump1 and pump2 drains at the rate of 25+5=30 gal/min
So, our equation to solve is:
30*t=18000
t=600 min
CK
In 600 min, pump1 drains 5*600=3000 gal
In 600 min pump2 drains 25*600=15000 gal
15000+3000=18000
Hope this helps---ptaylor
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