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Mathematics, 12.05.2021 05:40 rose3358
One pipe fills an empty tank in 3 hours. A second pipe fills the same tank in 6 hours. A third pipe can empty the full tank in 5 hours. If all three valves were left open, how long would it take to fill the empty tank?
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One pipe fills an empty tank in 3 hours. A second pipe fills the same tank in 6 hours. A third pipe...
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