Multiple Choice Questions on The length of a rectangular hall is 5m more than its breadth The area of the hall is 750 sq m The le........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The length of a rectangular hall is 5m more than its breadth The area of the hall is 750 sq m The le...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    The length of a rectangular hall is 5m more than its breadth. The area of the hall is 750 sq.m. The length of the hall is

    30 m

    Correct Answer

    20 m

    Incorrect Answer

    10 m

    Incorrect Answer

    40 m

    Incorrect Answer
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    Explanation:

    Let breadth = x m
    Then, length = (x+5)m
    Area of a rectangle = Length x Breadth
    x(x+5) = 750 
    x² + 5x - 750= 0
    (x+30)(x-25)= 0
    x = 25 or x = -30
    Hence, breadth x = 25m
    => Length = x + 5 = 25 + 5 = 30m

    By: MIRZA SADDAM HUSSAIN
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