Question

Distinguish between instantaneous speed and average speed

Answer 1

Average speed is the speed averaged over a span of time. Usually the total distance covered divided by the total time span. Instantaneous speed would be the speed any any given instant within that span of time, measured with a realtime speedometer.

Answer 2

. Instantaneous speed would be the speed any any given instantwithin that span of time, measured with a realtime speedometer.

Average speed is a rate. In kinematics, a rate is always a quantity divided by the time taken to get that quantity (the elapsed time). Since average speed is the rate position changes, average speed = distance traveled/time taken.