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Railways - Engineering

Q1:

If D is the distance between parallel tracks G is the gauge and α is angle of crossings, the distance between theoretical noses of two crossings measured parallel to tracks, is

A (D - G - G sec α) cot α

B (D - G + G sec α) cot α

C (D - G - G sec α) tan α

D (D + G + G sec α) cot α

ANS:A - (D - G - G sec α) cot α

No answer description is available.