The cube

The cube has a surface area of 216 dm². Calculate:
a) the content of one wall,
b) edge length,
c) cube volume.

Correct answer:

S₁ =  36 dm²
a =  6 dm
V =  216 dm³

Step-by-step explanation:

$$\begin{gathered} S=216{\text{dm}}^2 \\ {S}_1=S\mathrm{/}6=216\mathrm{/}6=36{\text{dm}}^2 \end{gathered}$$

$$\begin{gathered} S_1=a^2 \\ a=\sqrt{S_1}=\sqrt{36}=6\text{ dm} \end{gathered}$$

$V=a^3=6^3=216{\text{dm}}^3$

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