2017 · Q37
30 men can complete a job in 40 days. However, after 24 days some men out of the assigned 30 left the job. The remaining people took another 40 days to complete the job. The number of men who left the job is
Elementary MathematicsTime and Work
- A24
- B18
- C12
- D6
Explanation
Total work = 30×40 = 1200 man-days; work done in 24 days = 720 man-days. The remaining 480 man-days were done in 40 days by 480/40 = 12 men. Men who left = 30−12 = 18. Hence option (B) 18.