Question
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:
Answer: Option D
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100 cm is read as 102 cm.
So, A1 = (100 x 100) cm2 and A2 (102 x 102) cm2.
(A2 - A1) = [(102)2 - (100)2]
= (102 + 100) x (102 - 100)
= 404 cm2
So, Percentage error = \(\left(\frac{404}{100\times100}\times100\right)\) % = 4.04%
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