Multiple Choice Questions on If the area of a circle is 9 pi sq cm then its circumference is ........ for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

If the area of a circle is 9 pi sq cm then its circumference is ........

Quantitative Aptitude (RRB NTPC) Mensuration 2D
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    If the area of a circle is 9π sq. cm then its circumference is

    9 cm 
     

    Incorrect Answer

    6π cm

    Correct Answer

    3π cm 

    Incorrect Answer

    6 cm

    Incorrect Answer
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    Explanation:

    Given, π??
    2 = 9π
    r=3cm
    circumference = 2πr= 2π×3 =6π cm

    By: Barka Mirza
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