A car travels 50 miles in 9 hours. What is its average speed?
The average speed is 5.5555556 mph.
How to work it out
- 1
Write down what you know: distance d = 50 miles, time t = 9 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 5.5555556 mph.
- 4
The same formula rearranged: distance = speed × time (5.5555556 × 9 = 50 miles) and time = distance ÷ speed (50 ÷ 5.5555556 = 9 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{50}{9} = 5.5555556\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{50}{9} = \frac{50}{9} = 5.5555556 \]How far at 5.5555556 mph
| Time | Distance |
|---|---|
| 0.5 hours | 2.7777778 miles |
| 1 hour | 5.5555556 miles |
| 2 hours | 11.111111 miles |
| 3 hours | 16.666667 miles |
| 4 hours | 22.222222 miles |
| 5 hours | 27.777778 miles |
Questions
What is the speed if a car travels 50 miles in 9 hours?
The average speed is 5.5555556 mph.
How far does it go in 3 hours at that speed?
16.666667 miles.