Step-by-step explanation:
r = 3 in
Total height = 8+8+8= 24 in
[tex]SA = 2\pi {r}^{2} + 2\pi \: rh[/tex]
[tex] = 2\pi \: r(r + h)[/tex]
[tex] = 2 \times 3.14 \times 3(3 + 24)[/tex]
[tex] = 6 \times 3.14 \times 27[/tex]
[tex] = 508.68 {in}^{2} [/tex]
