-
A can do a piece of work in 20 days and B can do the same piece of work in 30 days. Find in how many days both can do the work ?
-
- 16 days
- 14 days
- 10 days
- 12 days
Correct Option: D
| A ’s 1day’s work = | ||
| 20 |
| B ’s 1day’s work = | ||
| 30 |
| ∴ (A + B)’s 1 day’s work = | + | 20 | 30 |
| (A + B)’s 1 day’s work = | + | 60 | 12 |
Hence, the work will be completed in 12 days. When worked together.
Second method to solve this question ,
| Time taken = | days | |
| x + y |
| Time taken = | days | |
| 20 + 30 |
| Time taken = | = 12 days | |
| 50 |
