Answer :

Answer:

[tex]456m^2[/tex]

Step-by-step explanation:

[tex]A=2(wl+hl+hw)=2*(12*4+5*4+5*12)=256m^2[/tex](rectangle)

[tex]A=\frac{1}{2} bh+bh+bh+bh\\=(2(\frac{1}{2}) *4*2)+(3*(12*5))\\=200m^2[/tex](triangular prism)

[tex]200+256=456m^2[/tex]

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