A car travels 200 miles in 11 hours. What is its average speed?
The average speed is 18.181818 mph.
How to work it out
- 1
Write down what you know: distance d = 200 miles, time t = 11 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 18.181818 mph.
- 4
The same formula rearranged: distance = speed × time (18.181818 × 11 = 200 miles) and time = distance ÷ speed (200 ÷ 18.181818 = 11 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{200}{11} = 18.181818\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{200}{11} = \frac{200}{11} = 18.181818 \]How far at 18.181818 mph
| Time | Distance |
|---|---|
| 0.5 hours | 9.0909091 miles |
| 1 hour | 18.181818 miles |
| 2 hours | 36.363636 miles |
| 3 hours | 54.545455 miles |
| 4 hours | 72.727273 miles |
| 5 hours | 90.909091 miles |
Questions
What is the speed if a car travels 200 miles in 11 hours?
The average speed is 18.181818 mph.
How far does it go in 3 hours at that speed?
54.545455 miles.