8th Class Mathematics Menstruation Question Bank Mensuration

  • question_answer The surface area of a sphere is x. What is its volume?

    A)  \[8470{{m}^{2}}\]             

    B)  \[100m\times 75m\times 22m\]

    C)  \[50{{m}^{3}}\]                 

    D)  \[3{{x}^{2}}h\]

    Correct Answer: B

    Solution :

    Let r be the radius of the sphere, then \[{{d}_{1}}\] \[{{d}_{2}}\] \[{{90}^{o}}\] \[=\frac{1}{2}\left( sum\text{ }of\text{ }parallel\text{ }sides \right)\times height\] Volume\[=\frac{1}{2}({{b}_{1}}+{{b}_{2}})h\] \[=\pi {{r}^{2}}\]

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