An error of 2% in excess is made while measuring he side of a square . The percentage of error in he calculated area of the square is :
100 cm is read as 102 cm
`:.` `A_1 = (100 xx 100) cm^2 `
and `A_2 = (102 xx 102) cm^2`
`(A_2 - A_1) = [(102)^2 - (100)^2]` = (102 + 100) x (102 - 100) = 404`cm^2`
`:.` Percentage error = `((404)/(100 xx 100) xx 100)`% = 4.04%
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