Remark
Don't be fooled by the size of the numbers. You do this the same way you would if you were doing a question on the distance between New York and Boston on a map where they are 2.5 inches apart. What you can do is set up a proportion and leave off the word trillion until the very end.
Givens
d1 = 50 (trillion) light years. scale size = 3 inches.
d2 = x scale size 1 = 18 inches.
[tex] \dfrac{50}{3} = \dfrac{x}{18} \text{......Cross Multiply} [/tex]
50*18 = 3x
900 = 3x Divide by 3
900/3 = x
300 = x
Answer
The distance between the two stars is 300 light years which is unimaginable.
