If the radius of a circle is increased by 10% then the area is increased by: Choices:
A) 44%
B) 120%
C) 144%
D) 40%
E) 21%
initially A=pi*r2   now R2=110/100r   then area=Pi*(110R/100)2   area=121R/100   that is area increases from 100 to 121=increase in area=21%   ANSW21%R:21%
<result>E</result>
If the radius of a circle is increased by 10% then the area is increased by: