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10th Class Mathematics Areas Related to Circles Question Bank MCQs - Areas Related to Circles

  • question_answer
    The perimeter of a semicircle whose radius is \[\text{7 cm},\] is:

    A) \[\text{18 cm}\]

    B) \[\text{26 cm}\]

    C) \[\text{30 cm}\]

    D) \[\text{36}\,\text{cm}\]

    Correct Answer: D

    Solution :

    [d] Let ‘r’ be the radius of semicircle
    where \[r=7\,cm\]
    Perimeter of a semicircle \[=\pi r+2r\]
                                        \[=\frac{22}{7}\times 7+2\times 7\]
                                        \[=22+14=36\]
    Hence, perimeter of semicircle is \[\text{36 cm}\]


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