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10 man can make a wall in 8 days. How many men required to complete the same work in half days?

80
100
120
160

Correct Answer: 160

Explanation:

Given, M₁ = 10 D₁ = 8, M₂ = ? and D₂ = 1/2
From M₁D₁ = M₂D₂
⇒ 10 x 8 = M₂ x 1/2
⇒ M₂ = 10 x 8 x 2
∴ M₂ = 160

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