The volume of a cone with height equal to radius, and slant height 5 cm is :
1
\( \frac{125 \pi}{12 \sqrt{3}} \mathrm{~cm}^3 \)
2
\( \frac{125 \pi}{6 \sqrt{3}} \mathrm{~cm}^3 \)
3
\( \frac{125 \pi}{12 \sqrt{2}} \mathrm{~cm}^3 \)
4
\( \frac{125 \pi}{6 \sqrt{2}} \mathrm{~cm}^3\)