area of square S and the area of circle C...

[jonnysunn]

If the area of square S and the area of circle C are equal, then the ratio of the perimeter of S to the circumference of C is closest to

1. 7/9
2. 8/9
3. 9/8
4. 4/3
5. 2/1

[check.stone]

s^2=pi*r^2, find 4s:2pi*r

s^2/r^2 = pi; sqrt(pi) = s/r

2s^2/r = 2pi*r; 4s:2s^2/r => 2:s/r=sqrt(pi) => 2:1.8 => 9:8, 3/C