Speed and other rates
Speed tells you how far you go in one unit of time. Distance, speed and time are linked by one triangle.
Key facts
- Speed = distance ÷ time.
- Distance = speed × time.
- Time = distance ÷ speed.
- Check your units match (km and hours, or m and seconds).
Worked examples
Example 1
A train travels 240 km in 3 hours. What is its average speed?
- Speed = distance ÷ time. 240 ÷ 3 = 80 km/h
Answer: 80 km/h