# Surface area of a cube

What is the surface area of a cube that has an edge of 3.5?

Result

S =  73.5

#### Solution:

$a = 3.5 \ \\ S = 6 \cdot \ a^2 = 6 \cdot \ 3.5^2 = \dfrac{ 147 }{ 2 } = 73.5$

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