Change in the Area of a Circle
Source:
June 13, 2009
geometry
Problem Statement
The area of a circle is doubled when its radius is increased by . Then equals:
(A)\ n(\sqrt{2} \plus{} 1)\qquad
(B)\ n(\sqrt{2} \minus{} 1)\qquad
(C)\ n\qquad
(D)\ n(2 \minus{} \sqrt{2})\qquad
(E)\ \frac{n\pi}{\sqrt{2} \plus{} 1}