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Problem solving work problem [#permalink]
30 Nov 2010, 06:03
93% (02:17) correct
7% (02:15) wrong based on 15 sessions
Pumping alone at their respective constant rates, one inlet pipe fills an empty tank to 1/2 of capacity in 3 hours and a second inlet pipe fills the same empty tank to 2/3 of capacity in 6 hours. How many hours will it take both pipes, pumping simultaneously at their respective constant rates, to fill the empty tank to capacity?