Area Q3

3. 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:

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 =		404	x 100	%	= 4.04%
		100 x 100