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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%
2.02%
4%
.4.04%

Correct Answer: .4.04%

Explanation:

100 cm is read as 102 cm.

A1 = (100 x 100) and A2 =(102 x 102)

(A2 - A1) = [(102 x 102)-(100 x 100) ]= 404

Percentage error =[404/(100 x 100 )] x 100%= 4.04%

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