There are different ways of calculating speed. First, it is very easy to calculate speed when the values for distance and time are given. For example, if a car travels through a distance of 100 meters in 20 seconds, then the answer to this question can be calculated by using the formula; Speed = distance/time. Here the distance is 100m and the time is the 20s, so by dividing 100 by 20, you have 5 m/s as the speed. Speed is measured in meter per second (m/s).
This means if the distance is measured in kilometer and time is measured in an hour, then you will need to convert your final answer to meter/second (meters/second). At times, the values for speed and time will be provided, and you will be asked to determine the value for distance. In this case, you rearrange the formula to get something like this; Distance= speed x time. Let's use the figure above. Speed=5, time=20. Then, Distance=5 x 20= 100 meters.