Question

    The external and the internal radii of a hollow right

    circular cylinder of height 15 cm are 6.75 cm and 5.25 cm respectively. If it is melted to form a solid cylinder of height half of the orignal cylinder, then the radius of the solid cylinder is
    A 6 cm Correct Answer Incorrect Answer
    B 6.5 cm Correct Answer Incorrect Answer
    C 7 cm Correct Answer Incorrect Answer
    D 7.25 cm Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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