Under what condition is the magnitude of average velocity of an object equal to it's average speed?
Kindly refer to the link given below to get your answer :
We know that average speed = Total distance/Total time
and, average velocity = Total displacement/Total time
Magnitude of average velocity and average speed of a moving object is equal only if the object moves in a straight line and in such case the magnitude of displacement is equal to the distance travelled by the body.