-
Working 5 hours a day, A can complete a work in 8 days and working 6 hours a day, B can complete the same work in 10 days. Working 8 hours a day, they can jointly complete the work in
-
- 3 days
- 4 days
- 4.5 days
- 5.4 days
Correct Option: A
Using Rule 2,
Working 5 hours a day, A can complete a work in 8 days.
i.e. A can complete the work in 40 hours.
Similarly,
B will complete the same work in 60 hours.
∴ (A + B)'s 1 hour’s work
| = | + | = | ||||
| 40 | 60 | 120 |
| = | = | |||
| 120 | 24 |
Hence, A and B together will complete the work in 24 hours.
∴ They can complete the work in 3 days working 8 hours a day.
