Jerry Kramer and Elaine are driving from Dallas to Chicago, a distance of 925 mi. Jerry leaves at 7:12 AM and averages 64 mi/h. Kramer leaves at 6:38 AM and averages 71 mi/h. Elaine leaves at 5:55 AM and averages 66 mi/h. Newman departs Chicago heading for Dallas at the same time Kramer leaves at a speed of 75 mi/h.
c. At what time does Jerry pass Newman?
d. What percentage of the trip has Elaine completed at the time Newman has completed 70% of his trip?
I have no idea, sorry, other than the speed equation maybe that I already used. I have no idea how to answer those questions although I know it should be easy.
The Attempt at a Solution
I know they end up at their destinations at these times:
Newman: 6:58 PM
Kramer: 7:39 PM
Jerry: 9:39 PM
Elaine: 9:04 PM