18 men can earn ₹ 360 in 5 days. How much money will 15 men earn in 9 days?

1. ₹ 540
2. ₹ 360
3. ₹ 480
4. ₹ 600

Money earned is proportional to number of men and days. So,

Man - days / Money = constant

So, let money earned be = ₹ x

⇨ (18 × 5) / 360 = (15 × 9) / x

⇨ x = (15 × 9 × 360) / (18 × 9) = ₹ 540

The correct option is A.