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1 February, 06:14

If it takes 5 workers 20 hours to brick a house, how long will it take 8 workers to do the job if they all work at the same rate?

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  1. 1 February, 06:54
    0
    Answer: It's 12.5 hours.

    Step-by-step explanation:

    12.5 hours is correct. You are increasing the number of men.

    5 men * 20 hours = 100 man hours

    100 man hours : 8 men = 100 / 8 = 12.5 hours
  2. 1 February, 09:37
    0
    So 20 / 5 = 4 hours per person and then you need to do 20 / 8
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