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A cube is a three-dimensional figure as ...

A cube is a three-dimensional figure as shown in Fig 11.11. It has six faces and all of them are identical squares. The length of an edge of the cube is given by l. Find the formula for the total length of the edges of a cube.

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Total number of edges in a cube `= 12`
Length of an edge ` = l`
So, total length of all the edges `= 12**l=12l`
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