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Discussion :: Mensuration

  1. A metallic sphere of radius 12 cm is melted and drawn into a wire, whose radius of cross section is 16 cm. What is the length of the wire?
    2. A.
    45 cm
    B.
    18 cm
    C.
    90 cm
    D.
    180 cm
    E.
    None of these

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    Answer : Option E

    Explanation :

    Volume of the wire (in Cylindrical shape) is equal to the volume of the sphere. 

     Ï€(16)2 * h = (4/3)Ï€ (12)3 => h = 9 cm

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