Answer:
[tex]Area \ of \ triangle = \frac{1}{2} * base * height = \frac{1}{2} * 6 * (5-3.5) = 3*1.5 = 4.5m^2[/tex]
[tex]Area \ of \ rectangle = length * breadth = 6 * 3.5 = 21m^2[/tex]
[tex]Area \ of \ figure = 4.5 + 21 = 25.5 m^2[/tex]
