A bus covers a distance of 120 km in 4 hours. What is its average speed in km/h?

Step-by-step solution

1. Step 1: Recognise that the bus moves at a constant speed, so average speed equals speed.
2. Step 2: Use the formula for speed: $v=\frac{d}{t}$ where (d=120\text{ km}) and (t=4\text{ h}).
3. Step 3: Compute (v=\frac{120}{4}=30\text{ km/h}).
4. Step 4: Conclude that the bus’s average speed is (30\text{ km/h}).

Concept tested: average speed calculation

Published 16 October 2026 · How this solution was prepared and checked