- 15 days
- 20 days
- 25 days
- 30 days
- B
-
Work done by 28 men in 15 days
Total work=28*15=420
Work done by 21 men in how many days?
Total work=420/21=20 days
Work done by 28 men in 15 days
Total work=28*15=420
Work done by 21 men in how many days?
Total work=420/21=20 days