Answer:
The average distance is 999.936 light years.
Solution:
As per the question:
Ours is the Milky Way Galaxy with the diameter:
D = 1,00,000 ly
Radius, R =

Now,
A =

The area to each civilization, A' is:
A' =

The radius of each area of civilization, r:



Thus the average separation distance between civilizations is given as:
2r =
