-
A is thrice as good a workman as B and therefore is able to finish a job in 40 days less than B. Working together, they can do it in
-
- 14 days
- 13 days
- 20 days
- 15 days
Correct Option: D
Using Rule 2,
Time taken by A to complete the work = x days
∴ Time taken by B to complete the work = 3x days
So, 3x – x = 2x = 40
⇒ x = 20 and 3x = 60
∴ (A + B)’s 1 day’s work
| = | + | = | ||||
| 20 | 60 | 60 |
| = | = | |||
| 60 | 15 |
∴ A and B together will complete the work in 15 days
