A train is running at 20m/s on a railway line with radius of curvature 40,000 meters. The distance btw the two rails is 1.5 meters . For safe running of train the elevation of outer rail over the inner rail is ( g=10m/s2)
2.0 mm
1.75 mm
1.50 mm
1.25 mm
A
1.75 mm
B
1.25 mm
C
1.50 mm
D
2.0 mm
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