How Many Cars?(INPHO 2007)

Classical Mechanics Level 3

A car leaves point A for point B every ten minutes. The distance between A and B is 60 Km. The car travels at a speed of 60 km/hr.

What is the number of cars that a man driving from B to A will meet in route, if he starts from B simultaneously from one of the cars leaving A. The car from B also travels at 60 km/hr.

A question is a bit ambiguous and hence there can be two possible answers say (16,18). You have to figure out which are the two possible answers

1) Understand the question properly
2) Do it Graphically.

Image credit: Wikipedia Jonathan Wiklins

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