hello
from the image given, the figure is a cube and that means it has equal sides all through.
the formula of surface area of a cube is given as
[tex]\begin{gathered} S\mathrm{}A=6l^2 \\ l=\text{length of the sides} \end{gathered}[/tex]the length of the sides of this figure is given as 2.5 units
[tex]\begin{gathered} s\mathrm{}a=6\times(2.5)^2 \\ s\mathrm{}a=6\times6.25 \\ s\mathrm{}a=37.5\text{units}^2 \end{gathered}[/tex]from the calculations above, the surface area of the figure is 37.5 per squared units
