Units of speed
Speed is a measure of how fast something is travelling. Speed is distance divided by time.
The most common units of speed are metres per second (m/s), kilometres per hour (km/h) and
miles per hour (mph).
The formula for speed is speed = distance ÷ time.
To work out what the units are for speed, you need to know the units for distance and time.
Distance = speed x time
Time = Distance ÷ speed
Example:
The trip is 2 hour and 180 km are driven evenly. What is the driving speed?
Speed = 180 : 2 = 90 kilometres per hour (km/h)
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