The radius of a circle is increased by 1%. Find how much % does its area increases?
Choose the correct choice from the following answers:
A) 2.71% B) 2.81% C) 2.08% D) 2.01% E) 3.01%
r = 100 r = 101   r2 = 10000 r2 = 10201   10000 ---- 201   100 ---- ? =&gt; 2.01%   Answer: 2.01%
<result>D</result>
The radius of a circle is increased by 1%. Find how much % does its area increases?