SOLUTION: Jim can fill a pool carrying bucks of watter in 30minutes. Sue can do the job in 45 minutes. Tony can do the same job in 1 hr and 30 minutes. How quickly can all three fill the poo

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Question 142046: Jim can fill a pool carrying bucks of watter in 30minutes. Sue can do the job in 45 minutes. Tony can do the same job in 1 hr and 30 minutes. How quickly can all three fill the pool together?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Jim can fill a pool carrying bucks of water in 30 minutes. Sue can do the job in 45 minutes. Tony can do the same job in 1 hr and 30 minutes. How quickly can all three fill the pool together?
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Jim rate: 1/30 job/min
Sue rate: 1/45 job/min
Tony rate: 1/90 job/min
Together rate: 1/x job/min
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EQUATION:
1/30 + 1/45 + 1/90 = 1/x
3x + 2x + x = 90
6x = 90
x = 15 (time to fill the pool if they work together)
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Cheers,
Stan H.