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A person travels by car from one city to another with different constant speeds between pairs...

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 10.0 min at 60.0 km/h, 12.0 min at 70.0 km/h, and 30.0 min at 60.0 km/h and spends 20.0 min eating lunch and buying gas. (a) Determine the average speed for the trip. km/h (b) Determine the distance between the initial and final cities along the route. km

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