A sprinter set a high school record in track and field, running 200.0 m in 21.3 s. What is the average speed of the sprinter in kilometers per hour|||200m is 0.2km (divide by 1000)
21.3s is .0059 hours (there are 3600 seconds in an hour so divide by 3600)
average speed=vavg=d/t=0.2/.0059=33.9km/hour
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