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    Question

    If the numerical value of twice the curved surface area

    of a right circular cylinder is equal to the numerical value of its volume, then what is the numerical value of the diameter of the base of the cylinder?
    A 4cm Correct Answer Incorrect Answer
    B 8cm Correct Answer Incorrect Answer
    C 6cm Correct Answer Incorrect Answer
    D 2cm Correct Answer Incorrect Answer

    Solution

    The curved surface area of the cylinder = 2πrh The volume of the cylinder = πr²h ATQ-   2 × 2πrh = πr²h r = 4cm diameter = 2× 4 =8cm

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