A car travels a total of 56 kilometers during the first two hours of a trip and 16km during the third hour. It’s average speed for the trip is what?
Speed is distance over time. so the Vi= 56km/2h=28 km/h and the Vf=16 km/h. The average speed = (Vf+Vi)/2 =(28 km/h + 16 km/h)/2 = 22 km/h