Answer:
Adding 12 to the circle area is equal to the square area.
Or
s2 = 12 + A
Where
s = side of square
A = area of circle
So
s2 = 12 + 36
s2 = 48
Solve this for s to get the side length
Answer:
(D)
x + (x + 2) + (x + 4) = 66
Do 1,500x0.55 which equals
825 people