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In measuring the sides of a rectangle, one side is taken 5% in excess and the other 4% in deficit. Find the error percent in the area, calculate from the those measurements.

Correct Answer: 0.8%

Explanation:

let x and y be the sides of the rectangle then 


correct area = 105 100 x × 96 100 y  


 


Error% =  504 500 x y - x y = 4 500 x y  %


 


4 500 x y × 1 x y × 100 = 4 5 = 0 . 8


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