Answer :
The average speed is 10 m/second.
What is average speed ?
The overall distance the object covers in a given amount of time is its average speed. A scalar value represents the average speed. It has no direction and is indicated by the magnitude.
The change in position or displacement divided by the time periods during which the displacement happens is known as average velocity.
The only factor in average velocity is the object's displacement. However, the displacement's size may differ from the actual path's length. Because of this, we use average speed to characterize the rate of motion along a path.
Total time taken = 20 +4 = 25 seconds
Total distance = 250m
Average Speed = 250/25 = 10 m/second.
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