A train is moving with a speed of 12 m / s on rails which are 1.5 m apart. To negotiate a curve of radius 400 m, the height by which the outer rail…

A train is moving with a speed of $\displaystyle 12 \mathrm{~m} / \mathrm{s}$ on rails which are $\displaystyle 1.5$ m apart. To negotiate a curve of radius $\displaystyle 400$ m, the height by which the outer rail should be raised with respect to the inner rail is (Given, $\displaystyle \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$ ) :