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The internal and external radii of a hol...

The internal and external radii of a hollow spherical shell are 3 cm and 5 cm-respectively. It is melted and recast into a solid cylinder of diameter 14 cm, find the height of the cylinder. Also find the total surface area of the cylinder.

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The radii of internal and external surfaces of a hollow spherical shell are 3 cm and 5 cm respectively. It is melted and recast into a solid cylinder of diameter 14 cm. Find the height of the cylinder.

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Knowledge Check

  • The radius of the internal and external surfaces of a hollow spherical shell are 3 cm and 5 cm, respectively. If it is melted and recast into a solid cylinder of height 2(2)/(3) cm . Then, the diameter of the cylinder is

    A
    12 cm
    B
    7 cm
    C
    14 cm
    D
    None of these

  • The radii of the internal and external surfaces of metallic spherical shell are 4 cm and 5 cm respectively. It is mixed and recast into a solid right circular cylinder of height 12(1/3) cm . Then the diameter of the base of the cylinder will be-

    A
    3 cm
    B
    4 cm
    C
    8 cm
    D
    6 cm

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