Two stars in space are separated by a distance of 3.00 arcminutes as viewed from Earth at a distance of 2000 l

Question

Two stars in space are separated by a distance of 3.00 arcminutes as viewed from Earth at a distance of 2000 light years from Earth. If the stars were at a distance of 4000 light years from Earth then how many arcminutes apart would the stars be as viewed from Earth? Show your work.

Answer 1

90 arc seconds.

Really, there's hardly anything to it.  I'd say, "by inspection."