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

If D is distance between centres of two parallel track of gauge G, the

1.	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)
Answer» D. DN + G (4N + l +N2)

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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

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