If L is length of a rail and R is the radius of a curve, the versine h

1.	If L is length of a rail and R is the radius of a curve, the versine h for the curve, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

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If L is length of a rail and R is the radius of a curve, the versine h for the curve, is

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