Which one of the following is the correct expression for the versine (h) of a curve ?(Where l = length of rail on the curve portion and r = radius of curvature)

Which one of the following is the correct expression for the versine (

1.	Which one of the following is the correct expression for the versine (h) of a curve ?(Where l = length of rail on the curve portion and r = radius of curvature)
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

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Which one of the following is the correct expression for the versine (h) of a curve ?(Where l = length of rail on the curve portion and r = radius of curvature)

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