In the image below, the athlete will cover a certain distance in a certain time.

This is called Speed. 


The speed of these cars is over 150 kilometers per hour (150 km/h).


Speed is how fast something is moving

Speed is a measure of the distance travelled in a given time.

Distance is measured in Metres and Kilometres as the distance travelled per unit of time.

Time is measured in Seconds, Minutes and Hours


An athlete runs around a circular track on a field of diameter 336 m in 5 minutes and a half. She adjusts her shoes for 30 seconds then covers the second lap in 6 minutes.


(a) her speed in km/h during the first lap.

(b) her average speed for the whole time interval (take π = 22/7)