Physics help about average speed, please.?

A person travels by car from one city to another. She drives for 35.3 min at 67.4 km/h, 12.9 min at 106 km/h, 46.3 min at 31.1 km/h, and spends 14.6 min along the way eating lunch and buying gas. Part 1: Determine the distance between the cities along the route. Answer in units of km. I solved that part & got... show more A person travels by car from one city to another. She drives for 35.3 min at 67.4 km/h, 12.9 min at 106 km/h, 46.3 min at 31.1 km/h, and spends 14.6 min along the way eating lunch and buying gas.

Part 1: Determine the distance between the cities along the route. Answer in units of km.
I solved that part & got 86.45km

Part 2: Determine the average speed for the trip. Answer in units of km/h.
Please explain so I can understand the concept.
Update: Well, I got 1.262001157 and I got the question wrong. Thanks.
Update 2: 54.88 is wrong >.<
Update 3: @jonnyvz: I saw where I kept going wrong. I forgot to change it into hours not minutes. THANK YOU! :)
6 answers 6