Correct Answer - Option 3 : 6 : 25

**Given:**

Truck travels 480 m in 2 min

Bus travels 36 km in 3/5 hrs

**Formula used:**

Speed = distance/time

**Calculation:**

Truck's speed = 480/120 = 4 m/s

3/5 hrs = 36 min

Bus' speed = 36000/36 × 60 = 50/3 m/s

Required ratio = 4 : 50/3 = 6 : 25

**∴ the ratio is 6 : 25**