If N is the net difference of grades, S is the minimum overtaken sight distance in metres, the length (L) of a summit curve, is

If N is the net difference of grades, S is the minimum overtaken sight

1.	If N is the net difference of grades, S is the minimum overtaken sight distance in metres, the length (L) of a summit curve, is
A.	NS/4
B.	NS²/4
C.	NS²/4.8
D.	NS²/9.6
Answer» E.