Explanation: \(\text{Hints: } \tan \theta = \sin \theta = \frac{h}{x}; \, \tan \theta = \frac{v^2}{rg}\) \(\text{Solve: } r = 200 \, \mathrm{m}, \, v = 50.4 \, \mathrm{km/h} = \frac{50.4 \times 1000}{3600} = 14 \, \mathrm{ms^{-1}}\) \(\tan \theta = \frac{v^2}{rg} = \frac{(14)^2}{200 \times 9.8} = 0.1 \implies \theta = \tan^{-1}(0.1) = 5.7^\circ\) \(\text{ধরা যাক, } \tan \theta = \sin \theta = \frac{h}{x} \implies h = 0.1 \, \mathrm{m}\) \(\text{Ans. (C)}\)