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after 45 laps each of 10 km at an a average speed of 130.7 km/h , a speed way racer believes that he has beaten the track record of 126.3km/h and hence can relax for the next five laps at an average speed of 105 km/h. is this correct ? what would be his final averag speed for 50 laps?
yes he has beaten the track record
127.55km/h
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