Mathematics, 15.07.2021 16:50 oliviacolaizzi

A motorist travels 90 miles at a rate of 20 miles per hour. If he returns the same distance at a rate of 40 miles per hour, what is the average speed for the entire trip, in miles per hour?

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A motorist travels 90 miles at a rate of 20 miles per hour. If he returns the same distance at a rat...

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