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Mathematics, 06.05.2020 04:26, mhuerta71001
One pipe can fill a tank with oil in 3 hours. A second smaller pipe can fill the same tank in 7 hours. If both pipes were used at the same time, how long would they take to fill the tank?
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Answers: 3
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One pipe can fill a tank with oil in 3 hours. A second smaller pipe can fill the same tank in 7 hour...
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