A car travels 350 miles in 9 hours. What is its average speed?
The average speed is 38.888889 mph.
How to work it out
- 1
Write down what you know: distance d = 350 miles, time t = 9 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 38.888889 mph.
- 4
The same formula rearranged: distance = speed × time (38.888889 × 9 = 350 miles) and time = distance ÷ speed (350 ÷ 38.888889 = 9 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{350}{9} = 38.888889\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{350}{9} = \frac{350}{9} = 38.888889 \]How far at 38.888889 mph
| Time | Distance |
|---|---|
| 0.5 hours | 19.444444 miles |
| 1 hour | 38.888889 miles |
| 2 hours | 77.777778 miles |
| 3 hours | 116.66667 miles |
| 4 hours | 155.55556 miles |
| 5 hours | 194.44444 miles |
Questions
What is the speed if a car travels 350 miles in 9 hours?
The average speed is 38.888889 mph.
How far does it go in 3 hours at that speed?
116.66667 miles.