A cube is a three-dimensional figure as shown in the adjoining figure. 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.

It is given in the question that,


Length of edge of cube = l


Also,


Number of edges in the cube = 12


Therefore,


Total number of edges = Number of edges × Length of the edge


= 12 × l


= 12l


9