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Mathematics, 20.09.2019 20:30 chynad6395
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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One pump can fill a swimming pool in 8 hours and another pump can fill it in 10 hours. if both pumps...
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