The minimum radius (R in metres) of the valley curve for cubic parabola is given by _________
Where,
L = total length of valley curve
N = deviation angle in radians or tangent of the deviation angle
1
\(\frac{L}{N}\)
2
\(\frac{L}{2N}\)
3
\(\frac{L}{3N}\)
4
None of these
5
Question Not Attempted