r = 2 inches
total h of the cylinder = 6+6+6 = 18 inches
[tex]SA = 2\pi {r}^{2} + 2\pi \: rh[/tex]
[tex] = 2\pi \: r(r + h)[/tex]
[tex] = 2 \times 3.14 \times 2(2 + 18)[/tex]
[tex] = 2 \times 3.14 \times 2 \times 20[/tex]
[tex] = 251.2square \: inches[/tex]
