Multiple Choice Questions on A towel when bleached was found to have lost 20 of its length and 10 of its breadth The percent........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A towel when bleached was found to have lost 20 of its length and 10 of its breadth The percent...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth.  The percentage of decrease in area is:

    18%

    Incorrect Answer

    38%

    Incorrect Answer

    48%

    Incorrect Answer

    28%

    Correct Answer
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    Explanation:

    Let original length = x and original breadth = y.  
    Decrease in area = xy - (80x/100)*(90y/100) = (7/25)xy
    Decrease % =    (7/25)xy * (1/xy) * 100 = 28%

    By: MIRZA SADDAM HUSSAIN
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