Correct Answer - Option 2 : 7.5 days
Given:
15 men can complete a task in 10 days.
Formula:
M1 × D1 = M2 × D2
Calculation:
M1 = 15, D1 = 10 and M2 = 20
According to the formual
15 × 10 = 20 × D2
⇒ D2 = 150/20
⇒ D2 = 7.5 days
∴ 20 men can complete the same task in 7.5 days.
