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18 men or 36 boys working 6 hours a day can plough a field in 24 days. In how many days will 24 men and 24 boys working 9 hours a day plough the same field ?
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- 9
- 10
- 6
- 8
Correct Option: D
18 men ≡ 36 boys
⇒ 1 man ≡ 2 boys
∴ 24 men + 24 boys
≡ (24 + 12) men
≡ 36 men
M1D1T1 = M2D2T2
⇒ 18 × 24 × 6 = 36 × D2 × 9
| ⇒ D2 = | = 8 days | |
| 36 × 9 |
