Question

Rather than run in the school marathon, then decided to run with his brother and his new car. They drove to north from Pinehills to Silverlight covering a distance of 240 km in four hours. On the way, I stop for a traffic light. When the light change to green, the car started from 0 m/s (stop) in which the speed of 100 m/s in ten seconds

At what average speed did dan drive from pine hills to silver lake?

Answer 1

to calcukate average speed it's unimportant what happened on the way, but we need onky to know total distance d total time. so average speed was : 240 km / 4 hours = 60 km/h