A metal surface is exposed to 500 nm radiation. The threshold frequency of the metal for photoelectric current is $4.3 \times 10^{14} \mathrm{~Hz}$. The velocity of ejected electron is $\_\_\_\_$ $\times 10^5 \mathrm{~ms}^{-1}$ (Nearest integer) [Use: $\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}, \mathrm{me}=9.0 \times 10^{-31} \mathrm{~kg}$ ]