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    What is the total surface area of a solid cylinder whose radius is half the radius of a circle of area 154 m² and height is the same as its radius?
    Question

    What is the total surface area of a solid cylinder whose radius is half the radius of a circle of area 154 m² and height is the same as its radius?

    A.

    123 m²

    B.

    312 m²

    C.

    132 m²

    D.

    231 m²

    Correct option is D


    Area of circle = πr2 = 154
    22/7 × r^2=154
    r = 7 m
    radius of cylinder = 7/2 m
    TSA = 2πr (r + h)
    2 ×22/7 ×7/2 (7/2+7)=231 m^2

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