In the given figure of ractangular prism :
Length = 13 in, height = 12 in, width = 11 in
The expression for the surface area of rectangular prism is = 2 (LW +LH + HW)
As the prism is open with top, thue reduce the area of top part : Height x Length
The expression for the surface aea of the prism = 2(LW + LH + HW) - HL
Substitute the value :
[tex]\begin{gathered} \text{Surface area of the rectangle prism =}2\mleft(LW+LH+HW\mright)-HL \\ \text{Surface area of the rectangle prism =}2(13\times11+13\times12+12\times11)-13\times12 \\ \text{Surface area of the rectangle prism =706 in}^2 \end{gathered}[/tex]Surface area of rectangular prism is 706 in square.
