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    Question

    The curved surface area of a cone is 2013.6 cm² and its

    radius is 12 cm. Determine the height.
    A 12 cm Correct Answer Incorrect Answer
    B 36 cm Correct Answer Incorrect Answer
    C 47 cm Correct Answer Incorrect Answer
    D 15 cm Correct Answer Incorrect Answer

    Solution

    Let slant height of the cone be ‘l’ cm

    So, (22/7) × 12 × l = 2013.6

    Or, l = 49 cm

    So, height of the cone (h) = √{49² – 12²} = 47 cm

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