- 9 days
- 14 days
- 20 days
- None of these
- c
-
15 Men and Work days=12
1 Men and Work days=12*15
9 men and Work days=(12*15) / 9 = 20 days
15 Men and Work days=12
1 Men and Work days=12*15
9 men and Work days=(12*15) / 9 = 20 days