Area of trapizoid:-
[tex]\blue{A=\dfrac{1}{2}(b_1 +b_2)×h }[/tex]
According to the question,
[tex]\bold{\dfrac{1}{2}×(4+15)×4 }[/tex]
[tex]\bold{\dfrac{1}{2}×(19)×4 }[/tex]
[tex]\bold{\dfrac{1}{\cancel{2}}×(19)×\cancel{4}}[/tex]
[tex]\bold{19×2 ~m^2 }[/tex]
[tex]\bold{ 38~m^2 }[/tex]
