Answer:
[tex]324~ m^2[/tex]
Step-by-step explanation:
[tex]Given: L=9m, ~B=9m,~H=4.5[/tex]
[tex]Surface ~area= 2(LB+BH+HL)[/tex]
[tex]2(9*9+9**4.5+4.5*9)[/tex]
[tex]2(81+40.5+40.5)[/tex]
[tex]2*162[/tex]
[tex]324m^2[/tex]
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hope it helps...
have a great day!!
