Raymond B. answered • 11/09/23
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1/3 + 1/9 = 1/T
multiply by 9T
3T + T = 9
4T = 9
T = 9/4 = 2 1/4 hours to drain with both pumps Together
Sue F.
asked • 11/09/23Math math math math
A new type of pump can drain a certain pool and three hours an older pump can drain the pool in nine hours. How long will it take both pumps working together to drain the pool?
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