The area of a circle is four times its circumference. What is the diameter of the Circle?
Select
A) 4π  B) 16  C) 8  D) 12  E) 8π
pi*r^2 = 4*2*pi*r   r*pi(8 - r) = 0   r = 8   Diameter = 2r = 16   16
<result>B</result>
The area of a circle is four times its circumference. What is the diameter of the Circle?