SOLUTION: My question is: A train leaves Chicago traveling west at 60 miles per hour.An hour later at 12 noon, another train leaves Chicago traveling east at 80 miles per hour. When are the

Two vehicles leaving at different times going in the same direction.

VEHICLE           speed           time        distance
Early slow        r               t+h          d
Late fast         R               t            d

VARIABLES
Known: r, R, h
Unknown: t, d
Fast late vehicle departs h amount of time after early slow vehicle departs, and so the fast but later vehicle travels for less time.
Variable distance d is the catchup distance.



GOAL:  Solve for t