A car runs at  a constant speed on a circular track of radius 100 m, taking 62.8 s for every circular loop. The average velocity and average speed for each circular loop respectively is :

Average velocity is defined as the ratio of displacement to time taken while the average speed of a particle in a given interval of time is defined as the ratio of distance travelled to the time taken.On a circular path in completing one turn, the distance travelled in 2πr while displacement is zero.Hence, average velocity = displacementtime interval                                  = 0t = 0Average speed = Distancetime interval                         = 2πrt = 2×3.14×10062.8 = 10 m/s