the radius of the circle is reduced from 5cm to 4cm then the % change of area .	Select the correct option:
A) 36%  B) 37%  C) 35%  D) 38%  E) 39%
for 5cm -&gt; pi*r^2 --&gt; 3.14 * 5 ^ 2 -&gt; 78.539   for 4cm -&gt; pi*r^2 --&gt; 3.14 * 4 ^ 2 -&gt; 50.265   %change -&gt; (1- 50.265/78.539)*100= 36   ie 36%   36%NSWER:36%
<result>A</result>
the radius of the circle is reduced from 5cm to 4cm then the % change of area .