SOLUTION: One pump fills a tank 3 time as fast as another. Working together, they fill the tank in 6 minutes. How long does it take for each pump to fill the tank?
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Question 581047: One pump fills a tank 3 time as fast as another. Working together, they fill the tank in 6 minutes. How long does it take for each pump to fill the tank? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! One pump fills a tank 3 time as fast as another. Working together, they fill the tank in 6 minutes. How long does it take for each pump to fill the tank?
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Slower pump DATA:
time = 3x minutes/job ; rate = 1/(3x) job/min
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Faster pump DATA:
time = x min/job ; rate = 1/x job/min
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Together DATA:
time = 6 min/job ; rate = 1/6 job/min
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Equation:
rate + rate = together rate
1/(3x) + 1/x = 1/6
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Multiply thru by 6x:
2 + 6 = x
x = 8 minutes (time for the faster pump)
3x = 24 minutes (time for the slower pump)
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Cheers,
Stan H.
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