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    Question

    A metal sphere of radius 7.35 cm

    is melted and cast into a cylinder of height 12 cm. Find the curved surface area of the cylinder.
    A 654.4 cm² Correct Answer Incorrect Answer
    B 554.4 cm² Correct Answer Incorrect Answer
    C 556.4 cm² Correct Answer Incorrect Answer
    D 782.5 cm² Correct Answer Incorrect Answer

    Solution

    Let the radius of the cylinder be 'r' cm. ATQ,

    Thus, the curved surface area of the cylinder = 2×π× radius × height

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