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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 average 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?

Respuesta :

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

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