Q.

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» A. d (4r - 2g - d)]
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