The total surface area of a cube is ____ .

3 a^{2}

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6 a^{2}

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4 a^{2}

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5 a^{2}

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Solution

The correct option is A $6 a^{2}$
A cube has all edges of the same length. This means that each of the cube's six faces is a square. The total surface area is therefore six times the area of one face $6 a^{2}$ where $a$ is edge length of the cube.

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Similar questions

= 6 a^{2}

= 4 a^{2}

- [3 a^{2} - 2 a^{2} + 9 a^{2} - {6 a^{2} - (- 2 a^{2} + 3 a^{2})}]

[3 a^{2} - 2 a^{2} + 9 a^{2} - {6 a^{2} - (- 2 a^{2} + 3 a^{2})}]

6 a^{2} - 3 b^{2} + 2 a^{2} + 5 b^{2} - 4 a^{2}

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