Posted by Sam on Thursday, September 29, 2011 at 9:07pm.
You are driving home from college steadily at 95km/hour for 130km. It begins to rain and you slow to 65km/hour. You arrive home after driving 3 hours and 20 minutes. How far is your hometown from college?

math  Steve, Friday, September 30, 2011 at 5:36am
Work with the time of each section, since you know the total time.
Time at 95kph = 130/95 h
Time at 65 kph = t
130/95 + t = 10/3
t = 1.965 h
So, total distance is 130km + 65*1.965 = 130+127.7 = 257.7km 
math  458, Monday, October 3, 2011 at 6:38pm
drt