question down below thxx!!!!

Total Surface Area of a Cylinder is : 2πr(r + h)
Given that,
Now,
[tex] \sf \: 2\pi r(r + h) \\ \\ \longrightarrow \: \sf \: 2 \times 6\pi \times (15 + 6) \\ \\ \longrightarrow \: \sf \: 12\pi \times 21 \\ \\ \longrightarrow \: \sf \: 252\pi[/tex]