A car travels 340 miles in 5 hours. What is its average speed?
The average speed is 68 mph.
How to work it out
- 1
Write down what you know: distance d = 340 miles, time t = 5 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 68 mph.
- 4
The same formula rearranged: distance = speed × time (68 × 5 = 340 miles) and time = distance ÷ speed (340 ÷ 68 = 5 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{340}{5} = 68\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{340}{5} = 68 \]How far at 68 mph
| Time | Distance |
|---|---|
| 0.5 hours | 34 miles |
| 1 hour | 68 miles |
| 2 hours | 136 miles |
| 3 hours | 204 miles |
| 4 hours | 272 miles |
| 5 hours | 340 miles |
Questions
What is the speed if a car travels 340 miles in 5 hours?
The average speed is 68 mph.
How far does it go in 3 hours at that speed?
204 miles.