-
20 men or 24 women can complete a piece of work in 20 days. If 30 men and 12 women undertake to complete the work, the work will be completed in
-
- 10 days
- 12 days
- 15 days
- 16 days
Correct Option: A
20 men ≡ 24 women
⇒ 5 men ≡ 6 women
∴ 30 men + 12 women = 40 men
∴ M1D1 = M2D2
⇒ 20 × 20 = 40 × D2
| ⇒ D2 = | = 10 days | 40 |
Aliter : Using Rule 12,
Here, A = 20, B = 24, a = 20
A1 = 30, B1 = 12
| Required time = | A1B + B1A |
| = | 30 × 24 + 12 × 20 |
| = | 720 + 240 |
| = | = 10 days | 960 |
