If uncertainty in position and momentum are equal, then uncertainty in velocity is

From the Heisenberg uncertainty principle, 
$\text{Δ\hspace{0.17em}p.Δ\hspace{0.17em}x≥}\frac{\mathrm{h}}{4\mathrm{\pi }}\mathrm{\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}}\mathrm{or}\mathrm{\hspace{0.17em}\hspace{0.17em}}\mathrm{m\Delta V}\times \mathrm{\Delta }\mathrm{\hspace{0.17em}}\mathrm{x}\ge \frac{\mathrm{h}}{4\mathrm{\pi }}$
Or $\left(\mathrm{m\Delta V}\right)\ge \frac{\mathrm{h}}{4\mathrm{\pi }}(\because \mathrm{\Delta }\mathrm{x}=\mathrm{\Delta p})$
Or $\mathrm{\Delta }\mathrm{Velocity}\ge \frac{1}{2\mathrm{m}}\sqrt{\frac{\mathrm{h}}{\mathrm{\pi }}}$