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9 January, 12:58

7.39 persons can repair a road in 12 days working 5 hours a day in how many days will 30 persons working 6 hours a day complete a work

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  1. 9 January, 14:52
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    39 people : 12 days : 5 hours

    //Find 1 person

    1 person : 12 x 39 days : 5 hours

    1 person : 468 days : 5 hours

    //Find 30 people:

    30 people : 468 : 30 days : 5 hours

    30 people : 15.6 days : 5 hours

    //Find 1 hour:

    30 people : 15.6 x 5 days : 1 hour

    30 people : 78 days : 1 hour

    //Find 6 hours:

    30 people : 78 : 6 days : 6 hours

    30 people : 13 days : 6 hours

    Answer: 13 days
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