Alexandra makes a pattern. She uses 2 squares for every 3 triangles
in the pattern. How many triangles will Alexandra use if the pattern
has 18 squares?
A: 27
B: 19
C: 17
D: 12

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?