[tex]A _{t} = 2 \times ( lL + Lh + lh)[/tex]
[tex]A _{t} = 2 \times (10 \times 15 + 15 \times 8 + 10 \times 8)[/tex]
[tex]A _{t} = 2 \times (150 + 120 + 80)[/tex]
[tex]A _{t} = 2 \times 350 = 700 {cm}^{2} [/tex]
[tex]V = L \times l \times h[/tex]
[tex]V = 15 \times 10 \times 8[/tex]
[tex]V = 1200 {cm}^{3} [/tex]