New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    If a cone has a radius of 7 cm and a curved surface area of

    770 cm², find the height.
    A 12 cm Correct Answer Incorrect Answer
    B 36 cm Correct Answer Incorrect Answer
    C 48 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) × 7 × l = 770

    Or, l = 49 cm

    So, height of the cone (h) = √{49² – 7²} = 48 cm

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