A car travels 430 miles in 10 hours. What is its average speed?
The average speed is 43 mph.
How to work it out
- 1
Write down what you know: distance d = 430 miles, time t = 10 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 43 mph.
- 4
The same formula rearranged: distance = speed × time (43 × 10 = 430 miles) and time = distance ÷ speed (430 ÷ 43 = 10 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{430}{10} = 43\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{430}{10} = 43 \]How far at 43 mph
| Time | Distance |
|---|---|
| 0.5 hours | 21.5 miles |
| 1 hour | 43 miles |
| 2 hours | 86 miles |
| 3 hours | 129 miles |
| 4 hours | 172 miles |
| 5 hours | 215 miles |
Questions
What is the speed if a car travels 430 miles in 10 hours?
The average speed is 43 mph.
How far does it go in 3 hours at that speed?
129 miles.