Physics
posted by Jacky .
Sally travels by car from one city to another. She drives for 36.5 min at 90.7 km/h, 13.3 min at 120 km/h, and 57.4 min at 45.6 km/h, and she spends 16.3 min eating lunch and buying gas.
Find the total distance traveled.
Answer in units of km

change each time to hrs..
then figure each distance segement
distance1=90.7km/hr (36.5/60 hr)=...
then do all the distances that way.
add the distances to get time total distance
a nice second question is what was the average speed for the trip:
avg speed=totaldistance/totaltime 
ally travels by car from one city to another. She drives for 23.0 min at 80.0 km/h, 31.0 min at 35.0 km/h, and 31.0 min at 19.0 km/h, and she spends 5.0 min eating lunch and buying gas.
(a) Determine the average speed for the trip.