SOLUTION: Ted walks from his home to the post office at an average rate of 3 miles per hour. He then runs back at an average rate of 7 miles per hour. What is his average rate for the entire

Question 1032713: Ted walks from his home to the post office at an average rate of 3 miles per hour. He then runs back at an average rate of 7 miles per hour. What is his average rate for the entire trip?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Ted walks from his home to the post office at an average rate of 3 miles per hour. He then runs back at an average rate of 7 miles per hour. What is his average rate for the entire trip?
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Avg = 2*3*7/(3+7)
Avg = 4.2 mi/hr

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