Question

# Find the total surface area of cube having length of the edge ${\text{10cm}}$

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Hint: As we know that the area of one face of cube with side length a is ${{\text{a}}^{\text{2}}}$. And a cube is a combination of ${\text{6}}$ face so total surface area is ${\text{6}}{{\text{a}}^{\text{2}}}$.

As given that the length of the edge is ${\text{10cm}}$.
And so the total surface area of cube is ${\text{6}}{{\text{a}}^{\text{2}}}$
${\text{ = 6(10}}{{\text{)}}^{\text{2}}} \\ {\text{ = 6(100)}} \\ {\text{ = 600c}}{{\text{m}}^{\text{2}}} \\$
Hence 600 ${cm}^{2}$ is our required answer