A train has to negotiate a curve of radi...

A train has to negotiate a curve of radius 400m. The speed of the train is 72`km//hour`. The horizontal distance is to be raised with respect to the inner radius by h. IF distances between rail is l=1 m, the value of h will be (g=10`m//s^2`)

15 cm

10cm

5 cm

2.5 cm

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