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A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 90.0 km/h, 5.0 min at 90.0 km/h, and 50.0 min at 50.0 km/h and spends 25.0 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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