The above rough sketch repressents the shaded area of the mural and the shaded part is a rectangle.
Area of a shaded mural = Length x Breadth
[tex]\begin{gathered} \text{Length}=\text{ }\frac{6}{8}m \\ \text{Breadth}=\frac{4}{8}m \\ \text{area of the shaded mural = }\frac{6}{8}\times\frac{4}{8}=\frac{24}{64}=\frac{3}{8}m^2 \end{gathered}[/tex]Hence, the shaded area (blue) of the mural is deduced above.