To find distance speed is beside time so distance is speed multiplied by time. Afrac v2-u2 2s a 2sv2u2. In this example distance is in metres m and time is.
To find the speed distance is over time in the triangle so speed is distance divided by time.
Average speed is measured in units of distance per time and the average speed formula looks like this. Afrac v2-u2 2s a 2sv2u2. This is the formula to be remembered all the time. Distance speed x time.