Answer:
speed = 30 km/h
Explanation:
We are told that a 200 metres race is run by an athlete in 24 seconds. The question then asks us to calculate the athlete's speed in km/h.
To do this, let's first convert the given data into the required units:
• Converting from metres to kilometres:
To convert from 200 metres to kilometres, we have to divide it by 1000:
200 m = 200 m ÷ 1000 m/km
= 0.2 km
• Converting from seconds to hours:
To convert 24 seconds to hours, we have to divide it by 3600:
24 s = 24 s ÷ 3600 s/h
=
h
Now that we have the data in the appropriate units, we can use the following formula to calculate speed:

⇒ speed =

⇒ speed = 30 km/h
Therefore, the speed of the athlete is 30 km/h.