Question
Two trains approach each other on parallel tracks. Each has a speed of 20.0 km/hr with respect to the earth. If they are initially 18.0 km apart, how long (in seconds) will it be before they pass each other?
Answers
Henry
20t + 20t = 18 m.
t = 18/40 = 0.45h = 1620 s.
t = 18/40 = 0.45h = 1620 s.