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20 June, 01:55

a proofreader can read 200 pages one in 6 hours and one in 9 hours. Can both meet a 3-hour deadline to work to read the 200 pages?

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  1. 20 June, 04:48
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    Proofreader 1:

    6 hours = 200 pages

    1 hour = 200 : 6 = 33 1/3 pages

    Proofreader 2:

    9 hours = 200 pages

    1 hour = 200 : 9 = 22 2/9 pages

    Proofreader 1 + Proofreader 2:

    1 hour = 33 1/3 + 22 2/9 = 55 5/9

    3 hours = 55 5/9 x 3 = 166 2/3

    They can read 166 2/3 in 3 hours.

    Answer: No, they cannot meet the deadline to read 200 pages in 3 hours.
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