Write in the form of an algebraic expression:
(iv)Surface area of a cube is six times the square of its edge.

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Solution

Gven:
Let the surface area of the cube be $S$ and the length of edge be $a$ .

$Surface area of a cube = 6 (e d g e)^{2}$

$∴$ , $S = 6 a^{2}$

Hence, the required expression is $S = 6 a^{2}$ .

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