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8th Class Mathematics Cubes and Cube Roots Question Bank Cubes and Cube Roots

  • question_answer
    How many cubes of side 2 cm can be packed in a cubical box with inner side equal to 4 cm?

    A)  6                                

    B)  4                    

    C)  8                    

    D)         2                    

    Correct Answer: C

    Solution :

    Side of cubical box \[=4\text{ }cm\] \[\therefore \] Volume of cubical box \[={{4}^{3}}=64c{{m}^{3}}\] Side of each cube inside cubical box \[=2\text{ }cm\] \[\therefore \] Volume of each cube inside cubical box \[={{2}^{3}}\text{ }=\text{ }8\text{ }c{{m}^{3}}\] \[\therefore \] Required number of cubes\[=\frac{64}{8}=8\]


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