A car travels 240 miles in 11 hours. What is its average speed?
The average speed is 21.818182 mph.
How to work it out
- 1
Write down what you know: distance d = 240 miles, time t = 11 hours. You are asked for the speed v.
- 2
Use the formula speed = distance ÷ time:
- 3
Answer with the unit: 21.818182 mph.
- 4
The same formula rearranged: distance = speed × time (21.818182 × 11 = 240 miles) and time = distance ÷ speed (240 ÷ 21.818182 = 11 hours).
LaTeX source of the formulas on this page
\[ v = \frac{d}{t} = \frac{240}{11} = 21.818182\ \text{mph} \]
\[ v = \frac{d}{t} = \frac{240}{11} = \frac{240}{11} = 21.818182 \]How far at 21.818182 mph
| Time | Distance |
|---|---|
| 0.5 hours | 10.909091 miles |
| 1 hour | 21.818182 miles |
| 2 hours | 43.636364 miles |
| 3 hours | 65.454545 miles |
| 4 hours | 87.272727 miles |
| 5 hours | 109.09091 miles |
Questions
What is the speed if a car travels 240 miles in 11 hours?
The average speed is 21.818182 mph.
How far does it go in 3 hours at that speed?
65.454545 miles.