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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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