If the radius of a circle is decreased by 50%, find the percentage decrease in its area.	Choose the correct choice from the following options:  A) 25 %  B) 50 %  C) 75 %  D) 95 %  E) None of them
Let original radius = R. New radius =(50/100) R = (R/2)   Original area=22/7( R )2= and new area=  ((R/2))2= ( ( R )2)/4   Decrease in area =((3(22/7) (R )2 )/4 X (1/(22/7)( R)2) X 100) % = 75%   Answer is 75 %.
<result>C</result>
If the radius of a circle is decreased by 50%, find the percentage decrease in its area.