Multiple Choice Questions on In measuring the sides of a rectangle one side is taken 20 in excess and the other 10 in deficit Fin........... for ACIO - Intelligence Bureau Preparation

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Multiple Choice Questions

In measuring the sides of a rectangle one side is taken 20 in excess and the other 10 in deficit Fin...........

Quantitative Aptitude (IB) Percentage
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    In measuring the sides of a rectangle, one side is taken 20% in excess and the other 10% in deficit. Find the error per cent in area calculated from the measurement ?

    8% excess

    Correct Answer

    9% deficit

    Incorrect Answer

    12% excess

    Incorrect Answer

    11% deficit

    Incorrect Answer
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    Explanation:

    Since  Area of Rectangle = side1 x side2
    Therefore, error% in area
    = x + y + xy/100 %
    = [20 - 10 + ( -10 x 20)/100]% or 8%
    i.e. 8% excess

    Hence, option 1 is the correct answer.

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