A certain number of men completed a work in 60 days. If there were 8 more men, work could have been completed in 10 less days. How many men were there?

40

The correct answer is Option (3) → 40

Let Men Required to complete the work be x

We know that, Men required, M ∝ \(\frac{1}{Number of Days, D}\)

Thus, MD = Constant

M1 D1 = M2 D2

x × 60 = (x+8) × (60-10)

60 x = 50 x + 400

⇒ Men Required, x = 40