SOLUTION: A car travels 120 miles from A to B at 30 miles per hour but returns the same distance at 40 miles per hour. What is the average speed for the round trip?
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Question 262200: A car travels 120 miles from A to B at 30 miles per hour but returns the same distance at 40 miles per hour. What is the average speed for the round trip? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! first leg takes 4 hours and return takes 3 hours
240=r*7
240/7=r
34 2/7 mph average
not (40+30)/2=35 but is the extra work involved worth it?
