math
posted by uo on .
If the circumference of a circle of radius r inches is equal to the perimeter of square with a side length of s inches, r/s=
A. 4/π
B. 2/π
C. √2/π
D. √2/π
E. 1/2π
I need help.

side of square = 2
so perimeter of square = 4s
circumference of circle with radius r is 2πr
so ...
2πr = 4s
πr = 2s
r/s = 2/π