posted by Jackie on .
Sally travels by car from one city to another. She drives for 28.0 min at 63.0 km/h, 50.0 min at 40.0 km/h, and 50.0 min at 43.0 km/h, and she spends 13.0 min eating lunch and buying gas.
Find the trip's average speed and total distance traveled...
avg speed = total distance/time
total distance= rate1*time1 + rate2*time2 + ....
change minutes to hours.