john took at 5 1/2 mile walk to his friends house. He left at 11am. And arrived at his friend's house at 1pm. What was his avera
ge speed of walking? If the return trip took a half hour longer, how much lower was his average speed on return trip that on the trip to his friend's house?
5.5 miles over 2 hours--> 5.5/2= 2.75 miles per hour was his average walking speed. 5.5 miles over 2.5 hours --> 5.5/2.5= 2.2 miles per hour on the return trip meaning that his average speed was (2.75-2.2= 0.55) 0.55 miles per hour lower on the return trip
