Answer:
S.A. = 486 in²
Step-by-step explanation:
The formula of a volume of a cube:
[tex]V=a^3[/tex]
a - length of edge
The formula of a Surface Area of a cube:
[tex]S.A.=6a^2[/tex]
We have V = 729 ft³. Substitute:
[tex]a^3=729\to a=\sqrt[3]{729}\to a=9\ in[/tex]
[tex]S.A.=6(9^2)=6(81)=486\ in^2[/tex]
