10 men can do a work in 15 days working 4 hours a day. If after 5 days, 4 men…
2021
10 men can do a work in 15 days working 4 hours a day. If after 5 days, 4 men leave the work, then remaining work can be done in how many days?
- A.
50/3
- B.
20
- C.
53/3
- D.
18
Attempted by 16 students.
Show answer & explanation
Correct answer: A
Total work: 10 men * 15 days * 4 hours/day = 600 man-hours.
Work done in 5 days: 10 men * 5 days * 4 hours/day = 200 man-hours.
Remaining work: 600 - 200 = 400 man-hours.
Remaining men: 10 - 4 = 6 men.
Calculate remaining days (D): 6 men * D * 4 hours/day = 400 man-hours.
24 * D = 400
D = 400 / 24 = 50 / 3 days.
Final Answer: Option 1 (50/3)