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    Question

    The radius of the base of a solid

    right circular cylinder is 7 cm, and its height is four times the radius of the base. Determine the total surface area (in cm²) of the cylinder.
    A 1220 cm² Correct Answer Incorrect Answer
    B 1250 cm² Correct Answer Incorrect Answer
    C 1540 cm² Correct Answer Incorrect Answer
    D 1320 cm² Correct Answer Incorrect Answer

    Solution

    ATQ, Radius of the cylinder = 7 cm So, height of the cylinder = (4 × 7) = 28 cm Total surface area of the cylinder = 2 × (22/7) × 7 × (7 + 28) = 1540 cm2

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