If is the length of a sub-chord and is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to

If is the length of a sub-chord and is the radius of simple curve, the

1.	If is the length of a sub-chord and is the radius of simple curve, the angle of deflection between its tangent and sub-chord, in minutes, is equal to
A.	573 S/R
B.	573 R/S
C.	1718.9 R/S
D.	1718.9 S/R
Answer» E.