Multiple choice general knowledge

If it took 8 men 10 hours to build a wall, how long would it take 4 men to build it?

  1. 20 hrs

  2. 10 hrs

  3. 18

  4. none of these

  5. 22

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

This is an inverse proportion problem involving man-hours. If 8 men take 10 hours, the total work is 8 times 10, which equals 80 man-hours. Therefore, 4 men will take 80 divided by 4, resulting in 20 hours.