Correct Answer - Option 2 : 54 days

**Given:**

6 men and 9 women complete task = 24 days

Men are three times efficient

**Calculation:**

6m + 9w = 24days

According to the question,

1m = 3w, 1w = (1/3)m

Total work = [6m + 9 × (1/3)m] × 24

⇒ (6m + 3m) × 24

⇒ 216m

So, 4m complete the work = 216m/4m

⇒ 54 days

**∴ The 4 men complete the work in 54 days.**