Let's find the perimeter of the figure above , the figure is a rectangle. The perimeter of a rectangle is represented below
[tex]\begin{gathered} \text{perimeter}=2(l+w) \\ l=7\text{ unit} \\ w=3\text{ unit} \\ \text{perimeter}=2(7+3) \\ \text{perimeter}=2(10) \\ \text{perimeter}=20\text{ units} \end{gathered}[/tex]