The total surface area of a solid cylinder whose radius is r cm and height $$\frac{r}{2}$$ cm (in $$cm^{2}$$) is:

A

$$3\pi\frac{r^{2}}{2}$$

B

$$4\pi r^{2}$$

C

$$3\pi r^{2}$$

D

$$3\pi\frac{r^{3}}{2}$$