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2. The length of each side of a cube is 7

cm, then the length of its diagonal is

please give the correct answer

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## Answers

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**Answer:**

Since all faces of a cube are right angled, to adjacent ones.

We apply Pythagorean-Theorem to find lengths of hypotenuse.

First, diagonals in each faces are equal to :

→ Then, diagonals in a cube will equal to :

→ The diagonal of a cube is √3 times the edge.

Therefore, Option C, **7√3** cm is the answer.

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