Answer:
67.5km/hr
Explanation:
The average speed traveled is the total distance divided by the total time taken.
Average speed = [tex]\frac{total distance }{total time}[/tex]
Distance = speed x time
Time 1 = 2.5hrs
Speed 1 = 60km/h
Distance 1 = 2.5 x 60 = 150km
Time 2 = 1.5hrs
Speed 2 = 80km/h
Distance 2 = 1.5 x 80 = 120km
Average speed = [tex]\frac{150km + 120km }{2.5 + 1.5}[/tex] = 67.5km/hr
