Black Holes

The Escape Velocity From A Star Is Given By This Equation : $${\text{V}}_e=\sqrt{\frac{2\text{GM}}{R}}$$ Where, $$\begin{align} \text{V}_e&=\text{Escape Velocity}\\ \text{G}&=\text{Gravitational Constant}\\ &=6.673 \times 10^{-11} \text{N}m^2kg^{-2}\\ \text{M}&=\text{Mass of The Star}\\ \text{R}&=\text{Radius of The Star} \end{align}$$ Now we have to determine the Escape Velocity (in km/s) from a Black Hole which has an enormous Mass of $$6 \times 10^{30} kg$$ but a Radius of only$$5.00475\text{ km}$$ Clue: Plug the Mass and Radius in the Equation above. Don't forget to convert from kilometer to meter and vice versa!