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Multiple Choice Questions

The length of the rectangle is increased by 50 and breadth is decreased by 20 Then what is the perce...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    The length of the rectangle is increased by 50% and breadth is decreased by 20%. Then what is the percent change in the area?

    20% decrease

    Incorrect Answer

    20% increase

    Correct Answer

     80% increase

    Incorrect Answer

     30% decrease

    Incorrect Answer
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    Explanation:

    Original area = lb
    New length = 150/100l = 3/2l
    New breadth = 80/100b = 45/b
    New Area = 3/2l × 4/5b = 6/5lb
    Change in area
    = 6/5lb - lb = 1/5lb
    % change = 1/5lb/lb × 100
    = 20 % (increase)

    Hence, option 2 is the correct answer.

    By: MIRZA SADDAM HUSSAIN
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