Tessellate S.T.E.M.S - Physics - School - Set 1 - Problem 2

A curved road with radius of curvature $200\, m$ is banked with an angle of banking equal to $\tan^{-1}(0.2)$ . Now if the traffic is at double the speed for which the road is designed, the minimum value of the frictional coefficient needed is $(g = 10 m/s^2)$

This problem is a part of Tessellate S.T.E.M.S.