Multiple Choice Questions on In the figure given below the area of rectangle ABCD is 100 sq cm O is any point on AB and CD 20 cm ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

In the figure given below the area of rectangle ABCD is 100 sq cm O is any point on AB and CD 20 cm ...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    In the figure given below, the area of rectangle ABCD is 100 sq cm, O is any point on AB and CD = 20 cm. Then, the area of ΔCOD is

    40 cm2

    Incorrect Answer

    45 cm2

    Incorrect Answer

    50 cm2

    Correct Answer

    80 cm2

    Incorrect Answer
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    Explanation:


    Given that, CD = 20 cm
    And, area of rectangle ABCD = 100 cm2
    ⇒  AD × CD = 100
    ⇒  AD × 20 = 100
    ⇒  AD = 5 cm
    ?  AD = OP = 5 cm
    ∴  Area of ΔCOD = 1/2 × CD × OP =
    1/2 × 20 × 5 = 50 cm2

    By: Amit Kumar
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