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8th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer
    Find the radius of the cylinder whose lateral surface area is \[704\text{ }c{{m}^{2}}\]and height is\[8\text{ }cm\].

    A)  \[6\,cm\]                           

    B)  \[4\,cm\]           

    C)  \[8\,cm\]           

    D)         \[14\,cm\]

    Correct Answer: D

    Solution :

    Lateral surface area of a cylinder \[=2\pi rh=704\,\,c{{m}^{2}}\] \[\therefore \]   \[r=\frac{704}{2\pi h}=\frac{704}{2\times \frac{22}{7}\times 8}=14\,cm\]


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