A car travels 130 km in 9 hours. What is its average speed?
The average speed is 14.444444 km/h.
How to work it out
- 1
Write down what you know: distance d = 130 km, time t = 9 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 14.444444 km/h.
- 4
The same formula rearranged: distance = speed × time (14.444444 × 9 = 130 km) and time = distance ÷ speed (130 ÷ 14.444444 = 9 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{130}{9} = 14.444444\ \text{km/h} \]
\[ v = \frac{d}{t} = \frac{130}{9} = \frac{130}{9} = 14.444444 \]How far at 14.444444 km/h
| Time | Distance |
|---|---|
| 0.5 hours | 7.2222222 km |
| 1 hour | 14.444444 km |
| 2 hours | 28.888889 km |
| 3 hours | 43.333333 km |
| 4 hours | 57.777778 km |
| 5 hours | 72.222222 km |
Questions
What is the speed if a car travels 130 km in 9 hours?
The average speed is 14.444444 km/h.
How far does it go in 3 hours at that speed?
43.333333 km.