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# 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.

Q. 3.     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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Length of one edge of cube = l

Number of edges in a cube  = 12

So,  total length = $12 \times l=12l$

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