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The average speed would be 30 km/h

Speed is measured in length per time (for example km/h), so to calculate the average speed you divide 75 km by 2.5 hours. 75km/2.5hours - which would be 75/2.5 km/h = 30 km/h.

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2013-01-12 18:09:46
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Q: What is the average speed of a car that traveled a total of 75 kilometer in 2.5 hours?
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