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Sao kkkkkkkkkks

10/03/2017 at 12:12
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Three workers work together after 3 hours. If the first person is alone, after 8 o'clock will finish the work. If people
Monday alone, it must be 12 hours to complete. Ask a third party to do it alone after a few hours?



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    Nguyễn Việt Hoàng 10/03/2017 at 12:15

    In one hour the three of them did the job:
            1: 3 = 1/3 (work)
    In the first hour the number of jobs is:
            1: 8 = 1/8 (work)
    In one hour the second person to do the job is:
            1:12 = 1/12 (work)
    In one hour the third person to do the job is:
            1/3 - 1/8 - 1/12 = 1/8 (work)
    The third person who finishes work alone in time is:
            1: 1/8 = 8 (hour)

                Answer: 8 hours

  • ...
    Faded 26/01/2018 at 12:27

    In one hour the three of them did the job:
            1: 3 = 1/3 (work)
    In the first hour the number of jobs is:
            1: 8 = 1/8 (work)
    In one hour the second person to do the job is:
            1:12 = 1/12 (work)
    In one hour the third person to do the job is:
            1/3 - 1/8 - 1/12 = 1/8 (work)
    The third person who finishes work alone in time is:
            1: 1/8 = 8 (hour)

                Answer: 8 hours



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