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Puzzle Details

At the local F1 race track, Alex was testing the latest car.

During the eight test laps, Alex managed to average the first two laps at 100mph, the next two laps at 102mph, the next two laps at 140mph and the last two laps at 150mph.

What was the average speed for the entire 8 laps?

Puzzle Copyright © Kevin Stone

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Hint: It doesn't matter how long a lap is.

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