A car travels 70 km in 11 hours. What is its average speed?

The average speed is 6.3636364 km/h.

v = \frac{d}{t} = \frac{70}{11} = 6.3636364\ \text{km/h}

How to work it out

1
Write down what you know: distance d = 70 km, time t = 11 hours. You are asked for the speed v.
2
Use the formula speed = distance ÷ time:
$v = \frac{d}{t} = \frac{70}{11} = \frac{70}{11} = 6.3636364$
3
Answer with the unit: 6.3636364 km/h.
4
The same formula rearranged: distance = speed × time (6.3636364 × 11 = 70 km) and time = distance ÷ speed (70 ÷ 6.3636364 = 11 hours).

LaTeX source of the formulas on this page

\[ v = \frac{d}{t} = \frac{70}{11} = 6.3636364\ \text{km/h} \]
\[ v = \frac{d}{t} = \frac{70}{11} = \frac{70}{11} = 6.3636364 \]

What is the speed if a car travels 70 km in 11 hours?

The average speed is 6.3636364 km/h.

How far does it go in 3 hours at that speed?

19.090909 km.