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March 27, 2017

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If Sam can do a job in 4 days that Lisa can do in 6 days and Tom can do in 2 days, how long would the job take if they worked together to complete it?

  • Math - ,

    combined rate = 1/4 + 1/6 + 1/2 = 11/12

    so time taken for working at combined rate = 1/(11/12)
    = 12/11 hours
    or 1 hour and about 5 minutes

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