If D is distance between centres of two parallel tracks of gauge G with entire curved leads and equal angles of crossing, total length of crossover, is

If D is distance between centres of two parallel tracks of gauge G wit

1.	If D is distance between centres of two parallel tracks of gauge G with entire curved leads and equal angles of crossing, total length of crossover, is
A.	D (4R - 2G - D)
B.	D (3R - 2G -D)
C.	D (3R + 2G - D)
D.	D (4 + 2G - D)
Answer» B. D (3R - 2G -D)

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If D is distance between centres of two parallel tracks of gauge G with entire curved leads and equal angles of crossing, total length of crossover, is

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