If is the speed of a locomotive in km per hour, g is the acceleration due to gravity, is the distance between running faces of the rails and is the radius of the circular curve, the required super elevation is

If is the speed of a locomotive in km per hour, g is the acceleration

1.	If is the speed of a locomotive in km per hour, g is the acceleration due to gravity, is the distance between running faces of the rails and is the radius of the circular curve, the required super elevation is
A.	gV²/GR
B.	Rg/GV²
C.	GR/gV²
D.	GV²/gR
Answer» E.