A car travels 470 miles in 12 hours. What is its average speed?
The average speed is 39.166667 mph.
How to work it out
- 1
Write down what you know: distance d = 470 miles, time t = 12 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 39.166667 mph.
- 4
The same formula rearranged: distance = speed × time (39.166667 × 12 = 470 miles) and time = distance ÷ speed (470 ÷ 39.166667 = 12 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{470}{12} = 39.166667\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{470}{12} = \frac{235}{6} = 39.166667 \]How far at 39.166667 mph
| Time | Distance |
|---|---|
| 0.5 hours | 19.583333 miles |
| 1 hour | 39.166667 miles |
| 2 hours | 78.333333 miles |
| 3 hours | 117.5 miles |
| 4 hours | 156.66667 miles |
| 5 hours | 195.83333 miles |
Questions
What is the speed if a car travels 470 miles in 12 hours?
The average speed is 39.166667 mph.
How far does it go in 3 hours at that speed?
117.5 miles.