Question

Find the lateral surface area and the total surface area of a cube of side 8 cm.

Answer 1

Side of the cube = 8 cm
Lateral surface area = $4a^2$
$$\begin{gathered} =4\times 8\times 8 \\ =256{\mathrm{cm}}^2 \end{gathered}$$

∴ Total surface area of the cube = $6a^2$
$$\begin{gathered} =6\times 8\times 8 \\ =384{\mathrm{cm}}^2 \end{gathered}$$