Here's why:

* Average speed is the total distance traveled divided by the total time taken. It represents the overall speed over a period of time, not at a specific instant.

* Instantaneous speed, on the other hand, is the speed of an object at a specific point in time. It's the speed measured at that very instant.

Think of it like this:

* Imagine driving a car on a road trip. You might travel at different speeds along the way, stopping for breaks, etc. Your average speed is the overall speed you maintained throughout the trip.

* Instantaneous speed is the speed you see on your speedometer at any given moment.

Let me know if you have any other questions!