Ex 11.2, 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.
In a cube,
We have six identical squares on 6 face
So, all the sides must be equal.
∴ Length of all sides of cube = l
We need to find
Total length of all sides of cube
Total length of all sides
= l + l + l + l + l + l + l + l + l + l + l + l
= 12 l

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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