The track’s radius is 30 metres.
The train’s speed = 54 km/h = 54 x (5/18) = 15 m/s
The train’s mass is 106 kg.
The force of lateral friction created by the rails on the train wheels provides the needed centripetal force.
The needed banking angle to keep the rails from wearing out.
15 × 15)/ (30 x 10) = 0.75 tan= v2/rg
370 = tan -1 (0.75).