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Math Help - People with Jobs

  1. #1
    Member Rimas's Avatar
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    People with Jobs

    Twenty People did one fourth of a job in eight days. Then because of a building dedication it became necessary to complete the job in the next five dasys. How many more people were added to the crew of twenty to accomplish this task?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by Rimas View Post
    Twenty People did one fourth of a job in eight days. Then because of a building dedication it became necessary to complete the job in the next five dasys. How many more people were added to the crew of twenty to accomplish this task?
    The work rate of 1 person is r=(1/4)/(8*20) of the job per day.

    There is 3/4 of the job remaining, which requires (3/4)/r=480 person days.

    If we want to do this work in 5 days we need 480/5=92 people.

    RonL
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