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17 May, 10:21

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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  1. 17 May, 12:14
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    A) 9

    Step-by-step explanation:

    No. of hours required: 4*27 = 108

    If 6 machines working:

    108:6 = 18 hours

    27 - 18 = 9 hours fewer
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