Correct option is (b) 1
Given that in 8days an amount of Rs 2000 is earned by 40men.
Let x men earn Rs 200 in 2 days.
Here, the number of men is directly proportional to the number of days when the earning is fixed and the number of men is directly proportional to the amount of earnings when the number of days is fixed.
\(\therefore \frac x{40} = \frac 28 \times \frac{200}{2000}\)
⇒ \(x = 40 \times \frac 28 \times \frac {200}{2000}\)
⇒ x = 1
So, 1 man will earn Rs 200 in 2 days.