Welcome to your interview.
The question is on your right: Relative Motion Collision Distance. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
A train leaves station A at 60 mph. Another train leaves station B at 80 mph on the same track heading towards A. If they are 140 miles apart, how far apart are they one minute before they collide?