SOLUTION: One pump can fill a swimming pool in 8 hours and another pump can fill it in 10 hours. If both pumps are opened at the same time, how many hours will it take to fill the pool?
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Question 1042459: One pump can fill a swimming pool in 8 hours and another pump can fill it in 10 hours. If both pumps are opened at the same time, how many hours will it take to fill the pool?
You can put this solution on YOUR website! Let x be the amount of time it takes to fill the pool with both pumps working together, then
:
(1/8) + (1/10) = (1/x)
:
represents amount of pool filled in an hour working together
:
(5/40) + (4/40) = (1/x)
:
9/40 = 1/x
:
9x = 40
:
x = 4.44444 approx 4.4 hours
:
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it will take 4.4 hours to fill the pool
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