posted by Anonymous .
Sally travels by car from one city to another. She drives for 25.0 min at 71.0 km/h, 45.0 min at 45.0 km/h, and 43.0 min at 11.0 km/h, and she spends 10.0 min eating lunch and buying gas.
What is the average speed for the trip?what is the total distance traveled?
Average speed = (total distance)/(total time)
Total time = 25 + 45 + 43 + 10 minutes
Take it from there.