Here's another one?

Question

if my spaceship was going 70% the speed of light and was 80,000 miles ahead of your spaceship and your spaceship is going 72% the speed of light. How long before your spaceship hit my spaceship?

Answer 1

It's even worse.  If the ships are labeled A and B, it's not both 80,000 miles for A and 80,000 miles for B.  One ship sees a shorter distance.  You have to choose the distance between the ships in the point of view of someone.

Answer 2

This would depend on your point of view, time would move more slowly for the faster ship due to the relativity effects of time at such a high speed.  So from the point of view of the people on the front ship the time measured to impact would seem to be slightly less than what it would be measured to be by those on the rear ship who are moving much more rapidly and therefore experiencing time more slowly.

Watching from a third position, like the earth, it would just be a matter of plugging the variables and doing the math.