I'm struggling a problem which I can't find for it a solution and why is that correct.

lets assume I have circle (doesn't matter what its radios) if I have two cars, one car speed 3km/sec , second one is 1.5km/sec

if the two cars starts at the same point on the circle, will they collide/meet each other while traveling on the circle? if so, how is that?

I know the first car its speed more than the second one, but it might be a constant distance between first and second car .. so they will never meet ..

any help?