Multiple choice

15 men working 8 hours daily can do a work in 20 days. In how many days will 24 men do the same work working 10 hours daily?

  1. 10 days

  2. 12 days

  3. 15 days

  4. 20 days

  5. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Use the man-hours concept. Total work = 15 men × 8 hours × 20 days = 2400 man-hours. With 24 men working 10 hours daily, days needed = 2400/(24×10) = 10 days.