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Question

A cubical box with edge 18cm is filled with smaller cubes of edge 3cm. How many small cubes are there in the box?

A
218 cubes
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B
296 cubes
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C
26 cubes
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D
216 cubes
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Solution

The correct option is D 216 cubes
We know, the volume of a cube V=a3, where, a is the edge of the cube.

Now, edge of the cubical box =18cm.
Therefore, Volume of the cubical box =183=5832cm3.

Now, edge of the smaller cube =3cm.
Therefore, Volume of smaller cube=33=27cm3.

Then, Number of cubes Volume of the cubical boxVolume of the smaller cube
=583227=216 cubes.

Hence, option D is correct.

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