Mathematics, 14.02.2020 05:10 joejoefofana

A fountain has two basins, one above and one below, each of which has three outlets. The first outlet of the top basin fills the lower basin in two hours, the second in three hours, and the third in four hours. When all three upper outlets are shut, the first outlet of the lower basin empties it in three hours, the second in four hours, and the third in five hours. If all the outlets are opened, how long will it take for the lower basin to fill?

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A fountain has two basins, one above and one below, each of which has three outlets. The first outle...

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