Ans: B
The slant height of the right circular cone
The slant height of the right circular cone
$\begin{array}{cl}
= & \sqrt{3^2+4^2} \\
= & 5\text{ cm}
\end{array}$
Therefore, the total surface area of the solid
$\begin{array}{cl}
= & \pi (3)(5) + \dfrac{1}{2} \times 4\pi (3)^3 \\
= & 33\pi \text{ cm}^2
\end{array}$
