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SSC Sample Paper SSC CGL - Sample Paper-8

  • question_answer
    A solid metallic cone is melted and recast into a solid cylinder of the same base as that of the cone. If the height of the cylinder is 7 cm, the height of the cone was

    A)  20 cm             

    B)  21 cm    

    C)  28 cm             

    D)  24 cm

    Correct Answer: B

    Solution :

    Volume of the cone = Volume of the cylinder \[\Rightarrow \]   \[\frac{1}{3}\pi {{r}^{2}}{{h}_{1}}=\pi {{r}^{2}}{{h}_{2}}\] \[\Rightarrow \]   \[{{h}_{1}}=3{{h}_{2}}=3\times 7=21\,cm.\]


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