Multiple choice

Five persons paint a house in 3 days when they work 8 hours everyday. Then if one persons works 4 hours everyday, how much time (day) will he take to complete the same work?

  1. 30

  2. 15/2

  3. 6/5

  4. 3/10
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total work = 5 persons × 3 days × 8 hours = 120 person-hours. One person working 4 hours/day needs 120/4 = 30 days. This is an inverse proportion problem.

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