15 men can work a do in 12 days. How long it will take 9 men to do work?
15 men can work a do in 12 days. How long it will take 9 men to do work?
Explanation
If 15 men can complete the work in 12 days,
it means that the total number of man-days required to complete the work is:
15 men * 12 days = 180 man-days.
180 man-days / 9 men = 20 days.