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A and B working separately can do a piece of work in 10 days and 15 days respectively. If they work on alternate days beginning with A, in how many days will the work be completed ?
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- 18 days
- 13 days
- 12 days
- 6 days
Correct Option: C
Work done by 2 (A + B) in one day
| = | + | = | = | |||||
| 10 | 15 | 30 | 6 |
∴ Work done by (A + B) in one day
| = | 12 |
∴ (A + B) can complete the work in 12 days
