39.0 min at 40.0 km/h, an? Sally travels by car from one city to another. She drives for 26.0 min at 68.0 km/h, 39.0 min at 40.0 km/h, and 51.0 min at 17.0 km/h, and she spends 5.0 min eating lunch and buying gas.
(a) Determine the average speed for the trip.
_____ km/h
