1.

A railway track is banked for a speed v, by making the height of the outer rail h higher than that of the inner rail. The distance between the rails is d. The radius of the curvature of the track is r

Answer»

`(h)/(d)=(v^(2))/(rg)`
`TAN(SIN^(-)(h)/(d))=(v^(2))/(rt)`
`tan^(-1)((h)/(d))=((v^(2))/(rg))`
`(h)/(r)=(v^(2))/(DG)`

ANSWER :b


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