Answer:

44 km/h

Explanation:

To find the average speed, we must first find the total distance and total time.

Since the man drove for 3 hours in 40 km/h, we can find the distance he traveled by multiplying the time by the speed.

Therefore, for the first journey, the man traveled 120 km. Using the same equation for the second part of his trip, we will arrive at:

The man traveled for 100 km during the second part of his trip. To find the total distance, we must add both distances, and to find the total time, we must add both times.

Total Distance = 320 kilometers

Total Time = 5 hours

To find the average speed, divide the distance traveled by the time it took.

The average speed is 44 km/h