Home / Arithmetic Aptitude / Area :: Discussion

Discussion :: Area

1. 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:

2. A.

2%

B.

2.02%

C.
 4%
D.

4.04%

Answer : Option D

Explanation :

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 =[$$\frac { 404 } { 100*100 }$$x100]%=4.04%

Be The First To Comment