Railways - Engineering

Q1:

If D is distance between centres of two parallel track of gauge G, then, total length of cross-over (from the point of commencement to the point of termination) with an intermediate straight portion and N crossing, is given by

A
DN + G (N + 1 + N2)

B
DN + G (2N + 1 + N2)

C
DN + G (3N + 1 + N2)

D
DN + G (4N + l +N2)

ANS:C -

DN + G (3N + 1 + N2)

It is DN + 3GN + G(1 + N^2)^0.5.