Relative electric permittivity of a medium is q and relative permeability is close to unity. What is the speed of em waves in the medium ?

Speed of  EM  wave  in  vacuum  is  $\mathit{C}\mathbf{ }\mathbf{=}\mathbf{ }\frac{\mathbf{1}}{{\sqrt{{\mathbf{\mu }}_{\mathbf{o}}\mathbf{\epsilon }}}_{\mathbf{o}}}\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{\left(}\mathbf{1}\mathbf{\right)}$
and  speed  of EM  wave  in a  medium    $\mathit{V}\mathbf{ }\mathbf{=}\mathbf{ }\frac{\mathbf{1}}{{\sqrt{{\mathbf{\mu }}_{\mathbf{m}}\mathbf{\epsilon }}}_{\mathbf{m}}}\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{\left(}\mathbf{2}\mathbf{\right)}\mathbf{ }$
Dividing  eq  (2)  by  (1) 
                                     $$\begin{gathered} \mathbf{\Rightarrow }\mathbf{ }\frac{\mathbf{V}}{\mathbf{C}}\mathbf{ }\mathbf{=}\sqrt{\mathbf{ }\mathbf{\left(}\frac{{\mathbf{\mu }}_{\mathbf{m}}}{{\mathbf{\mu }}_{\mathbf{o}}}\mathbf{\right)}\mathbf{ }\mathbf{ }\mathbf{\left(}\frac{{\mathbf{\epsilon }}_{\mathbf{m}}}{{\mathbf{\epsilon }}_{\mathbf{o}}}\mathbf{\right)}} \\ \mathbf{ }{\mathit{\epsilon }}_{\mathbf{r}\mathbf{ }}\mathbf{ }\mathbf{=}\mathbf{ }\frac{{\mathbf{\epsilon }}_{\mathbf{m}}}{{\mathbf{\epsilon }}_{\mathbf{o}}}\mathbf{ }\mathbf{=}\mathit{q}\mathbf{ }\mathbf{ }\mathit{a}\mathit{n}\mathit{d}\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }{\mathit{\mu }}_{\mathbf{r}}\mathbf{ }\mathbf{=}\frac{{\mathbf{\mu }}_{\mathbf{m}}}{{\mathbf{\mu }}_{\mathbf{o}}}\mathbf{ }\mathbf{=}\mathbf{1}\mathbf{ }\mathbf{ }\mathbf{\left(}\mathit{g}\mathit{i}\mathit{v}\mathit{e}\mathit{n}\mathbf{\right)}\mathbf{ } \\ \mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\frac{\mathbf{V}}{\mathbf{C}}\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{=}\mathbf{ }\sqrt{\mathbf{q}}\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{\Rightarrow }\mathbf{ }\mathbf{ }\mathit{V}\mathbf{ }\mathbf{=}\sqrt{\mathbf{q}}\mathbf{ }\mathbf{ }\mathit{C} \end{gathered}$$