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What is the average speed of a car which takes 2 hours to travel 160 km?

# Speed 01

## A fascinating way to revise about calculating speed. Do you know how fast light travels?

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1.
The average speed of a car which takes 2 hours to travel 160 km is .......
80 m/s
80 km/s
80 km/h
320 km/h
160 km/2 h = 80 km/h. Note how the units match those given in the question
2.
A car travels 20 km in 12 minutes. The speed in km/h is .......
0.2 km/h
100 km/h
120 km/h
240 km/h
12 minutes = 12/60 = 0.2 hours so 20 km/0.2 h = 100 km/h
3.
The speed of a cyclist who rides 300 metres in 25 seconds is .......
0.12 m/s
12 m/s
24 m/s
7,500 m/s
300 m/25 s = 12 m/s
4.
A bus takes 2 hours to travel 40,000 metres. The average speed of the bus in km/h is .......
2 km/h
20 km/h
33 km/h
200 km/h
40,000 m = 40 km so speed = 40/2 = 20 km/h
5.
A cyclist travels 900 metres in 1 minute. The speed in m/s is .......
9 m/s
15 m/s
30 m/s
900 m/s
1 minute = 60 seconds so speed = 900/60 = 15 m/s
6.
The speed of an athlete who runs 200 metres in 20 seconds is .......
0.1 m/s
10 m/s
10 km/s
4,000 m/s
200/20 = 10 m/s
7.
It takes an hour to walk 1,800 metres up a steep hill. The speed in m/s is .......
0.5 m/s
1 m/s
1.8 m/s
2 m/s
1 hour = 60 minutes = 3,600 seconds so speed = 1,800/3,600 = 0.5 m/s
8.
An athlete runs 1 km in 100 seconds. Her speed in m/s is .......
0.001 m/s
1 m/s
10 m/s
100 m/s
1 km = 1,000 m so speed = 1,000 m/100 s = 10 m/s
9.
A child walks 90 metres in 3 minutes. The speed in m/s is .......
0.3 m/s
0.5 m/s
3 m/s
5 m/s
3 minutes = 180 seconds so speed = 90/180 = 0.5 m/s
10.
The SI unit of speed is .......
cm/s
m/s
km/s
m/h
Speed is also measured in km/h, miles/h - you must make sure units are correct