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Mathematics, 23.07.2019 02:00 alyssashae1818

Working together, nora, john and daphne can set the table in 4 minutes. if nora, alone, can set the table in 7 minutes, and john, alone, can set the table in 28 minutes, how long would it take daphne to set the table by herself?

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Working together, nora, john and daphne can set the table in 4 minutes. if nora, alone, can set the...
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