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Michael

What is the average speed for two rounds of a race driven at different speeds? First one at 100 mph, while second round for 200 mph.

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  1. Concise Answer: The average speed is 133.33 mph.
    Detailed Explanation: The average speed is not simply (100 + 200) / 2 = 150 mph because average speed is total distance divided by total time. The first round at 100 mph and the second at 200 mph each cover the same distance, so if the distance is D, the total distance is 2D, and the time taken is D/100 + D/200. The average speed is 2D / (D/100 + D/200) = 133.33 mph.