A car travels 170 miles in 1 hour. What is its average speed?
The average speed is 170 mph.
How to work it out
- 1
Write down what you know: distance d = 170 miles, time t = 1 hour. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 170 mph.
- 4
The same formula rearranged: distance = speed × time (170 × 1 = 170 miles) and time = distance ÷ speed (170 ÷ 170 = 1 hour).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{170}{1} = 170\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{170}{1} = 170 \]How far at 170 mph
| Time | Distance |
|---|---|
| 0.5 hours | 85 miles |
| 1 hour | 170 miles |
| 2 hours | 340 miles |
| 3 hours | 510 miles |
| 4 hours | 680 miles |
| 5 hours | 850 miles |
Questions
What is the speed if a car travels 170 miles in 1 hour?
The average speed is 170 mph.
How far does it go in 3 hours at that speed?
510 miles.