Question 1016249
Total distance: From A-B + From B-A = 6 mi + 6 mi = 12 mi
Total time: From A-B + From B-A = 2 hrs + 1 hr = 3 hrs
Speed = distance/time = 12 mi/3 hr = 4 mi/hr
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ANSWER : Average speed for the entire trip was 4 mph. (C is correct)