Multiple choice

A man working $8$ hours a day takes $5$ days to complete a project. How many hours a day must he work to complete it in $4$ days?

  1. $10$ hours
  2. $11$ hours
  3. $12$ hours
  4. $14$ hours
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A Correct answer
Explanation

Total work = 8 hours/day * 5 days = 40 man-hours. To complete in 4 days, hours/day = 40 / 4 = 10 hours.

AI explanation

The total man-hours required for the project remain constant, calculated as 8 hours per day multiplied by 5 days, giving 40 hours. To complete the same 40 hours of work in 4 days, he must work 10 hours a day.

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