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A is 30% more efficient than B, and can alone do a work in 23 days. The number of days, in which A and B, working together can finish the job is
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- 11 days
- 13 days
- 20 days
- 21 days
Correct Option: B
Using Rule 2,
Time taken by B
| = | × 23 = | days | ||
| 100 | 10 |
(A + B)’s 1 day’s work
| = | + | |||
| 23 | 299 |
| = | = | = | ||||
| 299 | 299 | 13 |
∴ Time taken by (A + B) = 13 days
