Multiple Choice Questions on The circumference of the 2 circle is 212cm and 412cm What is the difference between the area of the ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The circumference of the 2 circle is 212cm and 412cm What is the difference between the area of the ...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    The circumference of the 2 circle is 212cm and 412cm. What is the difference between the area of the 2 circles ?

    10048cm2

    Correct Answer

    10480cm2

    Incorrect Answer

    10070cm2

    Incorrect Answer

    10140cm2

    Incorrect Answer
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    Explanation:

    2*3.14*r1 = 212
    R1 = 212/6.28 = 33.75 = 34cm
    2*3.14*r2 = 412
    R1 = 412/6.28 = 65.60= 66cm
    Diff = 3.14(662-342)
    = 3.14(4356-1156) = 3.14*3200
    = 10048

    By: Amit Kumar
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