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12 men can complete a work in 90 days. 30 days after they started work, 2 men left and 8 men joined. How many days will it take to complete the remaining work ?
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- 90 days
- 60 days
- 40 days
- 50 days
Correct Option: C
Work done in 30 days = W2
| ∴ | = | |||
| W1 | W2 |
| ⇒ | = | |||
| 1 | W2 |
| ⇒ W2 = | = | |||
| 12 × 90 | 3 |
| Remaining work = 1 – | = | |||
| 3 | 3 |
New number of men = 18
| ∴ | = | |||
| 1 | W |
| ⇒ | = | |||
| 1 | 2/3 |
| ⇒ 18 × D2 = 12 × 90 × | = 12 × 60 | 3 |
| ⇒ D2 = | = 40 days | 18 |
