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What will be the area of each face of a cube with edge ' $a$ '?

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$4 a$

$a^{2}$

$a^{3}$

$2 a$

answer is B.

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Detailed Solution

Given :- the length of edge of a cube $= a$

To find :- the area of each face of a cube

We know that the face of the cube is in square shape and the length of each square face is equal to the edge of cube.

Therefore, the length of a square face is equal to ' $a$ '

And the area of each square face is $a \times a = a^{2}$ (By area of square formula i.e. $s i d e^{2}$ )

Hence, the correct option is option B.

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