An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is
Select:
A) 2%
B) 2.02%
C) 4%
D) 4.04%
E) None of above
100 cm is read as 102 cm.   A1 = (100 x 100) cm2 and A2 (102 x 102) cm2.   (A2 - A1) = [(102)2 - (100)2]   = (102 + 100) x (102 - 100)   = 404 cm2.   Percentage error = [(404/100x100)x 100]%   = 4.04%   Answer : 4.04%
<result>D</result>
An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is