Answer:
20 km/h
Explanation:The speed is calculated by dividing the distance traveled over the time used, both in the indicated unit. In this case we travel 100 km in 5 hours, then the average speed is 100 km/5h= 20km/h. Then the answer of the average speed is exactly 20 km/h, even though during that time it could travel at different speeds, in total at the end it was traveled in average 20 km per hour.