Arithmetic Ability
Area

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Q.

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:

View Answer

Correct choice: D

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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