SOLUTION: A car travels at a speed of 20 mph over a certain distance and then returns over the same distance at a speed of 30 mph. What is the average speed for the total journey?

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Question 319143: A car travels at a speed of 20 mph over a certain distance and then returns over the same distance at a speed of 30 mph. What is the average speed for the total journey?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Since the distances are the same, average speed is 1/2(20 + 30) = 25mph