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Mathematics, 28.02.2020 19:20 scavalieri2421

Six machines at a certain factory operate at the same constant rate. If four of these machines, operating simultaneously, take 27 hours to fill a certain production order, how many fewer hours does it take all six machines, operating simultaneously, to fill the same production order?A: 9B: 12C: 16D: 18E: 24

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