Mathematics, 02.08.2019 06:30 ashah1260
New type of pump can drain a certain pool in 5 hours. an older pump can drain the pool in 15 hours. how long will it take both pumps working together to drain the pool?
Answers: 2
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New type of pump can drain a certain pool in 5 hours. an older pump can drain the pool in 15 hours....
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