The metro which has been recently introduced in Mumbai, encounters a sharp turn between Andheri and Chakala. To avoid any derailing issues, the authorities thought of banking the rails. The turn is of a radius of 400 m and the maximum speed attained by Mumbai Metro is 72 km/hr. If the distance between the rails is 1 m then through what height should the outer rail be raised?
(A) 2.5 cm
(B) 0.5 cm
(C) 10 cm
(D) 15 cm