Two stations 'A' and 'B', present at a latitude of $30^{\circ} \mathrm{N}$ are separated by a distance of $10$ km . If the difference in sea surface height between these two stations is 1 m , what will be the magnitude of geostrophic current velocity in SI units? $\text{(Assume the angular velocity of earth is}$ $\left.10^{-4} \mathrm{~s}^{-1}\right)$ $\text{(Answer in integer)}$