ANSWER
![C)339.29in^2](https://img.qammunity.org/2023/formulas/mathematics/college/nqycnz6d9e5bk4d1uauu66cu8uggcy0qmo.png)
Step-by-step explanation
We want to find the total surface area of the given cylinder.
To do this, apply the formula for total surface area of a cylinder.
That is:
![SA=2\pi r(r+h)](https://img.qammunity.org/2023/formulas/mathematics/college/xw0oo0367ppaqzk6ln2kduys6d6r3hsgp8.png)
where r = radius; h = height
Therefore, the total surface area of the given cylinder:
![\begin{gathered} SA=2\pi\cdot3(3+15) \\ SA=6\pi\cdot18 \\ SA=339.29in^2 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/2lkrsgfrj2echbzu9m064ig9w825uv7qaa.png)