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:

1.04
2.04
3.04
4.04

Correct Answer: 4.04

Explanation:

100 cm is read as 102 cm.

A1 = (100*100)Sq.cm

A2 = (102*102)Sq.cm

(A2 - A1) = $1022 - 1002$ = (102 + 100) x (102 - 100) = 404 sq.cm.

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