If G is gauge is metres, V is speed of trains in km/hour and R is radius of a curve in metres, the equilibrium superelevation is

• A. <img src="/_files/images/civil-engineering/railways/57-17-114-1.png">
• B. <img src="/_files/images/civil-engineering/railways/57-17-114-2.png">
• C. <img src="/_files/images/civil-engineering/railways/57-17-114-3.png">
• D. <img src="/_files/images/civil-engineering/railways/57-17-114-4.png">
• E. <img src="/_files/images/civil-engineering/railways/57-17-114-4.png">