chemistry

A sprinter set a high school record in track and field, running 200.0 m in 21.0s . What is the average speed of the sprinter in kilometers per hour?

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asked by jay
  1. (200 m/21 s) x (1 km/1000 m) x (60 s/min) x (60 min/hr) = ?

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    posted by DrBob222
  2. vgrfazbfa

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    posted by britt

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