Multiple Choice Questions on If the circumference of a circle is 22 cm find the area of the semicircle ........ for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

If the circumference of a circle is 22 cm find the area of the semicircle ........

Quantitative Aptitude (RRB NTPC) Mensuration 2D
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    If the circumference of a circle is 22 cm, find the area of the semicircle.

    38.5 sq.cm

    Incorrect Answer

    19.25 sq.cm

    Correct Answer

    44 sq.cm

    Incorrect Answer

    77 sq.cm

    Incorrect Answer
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    Explanation:
    Circumference of circle = 2 π r
    ⇒ 22 =2*22/7*r
    ⇒ r = 3.5 cm
    ∴ Area of semicircle =(pia*r^2)/2=1/2*22/7*3.5*3.5
    =19.25 cm²

    By: Barka Mirza
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