A car travels 190 miles in 9 hours. What is its average speed?
The average speed is 21.111111 mph.
How to work it out
- 1
Write down what you know: distance d = 190 miles, time t = 9 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 21.111111 mph.
- 4
The same formula rearranged: distance = speed × time (21.111111 × 9 = 190 miles) and time = distance ÷ speed (190 ÷ 21.111111 = 9 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{190}{9} = 21.111111\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{190}{9} = \frac{190}{9} = 21.111111 \]How far at 21.111111 mph
| Time | Distance |
|---|---|
| 0.5 hours | 10.555556 miles |
| 1 hour | 21.111111 miles |
| 2 hours | 42.222222 miles |
| 3 hours | 63.333333 miles |
| 4 hours | 84.444444 miles |
| 5 hours | 105.55556 miles |
Questions
What is the speed if a car travels 190 miles in 9 hours?
The average speed is 21.111111 mph.
How far does it go in 3 hours at that speed?
63.333333 miles.