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A train is moving with a speed of 12 m/s on rails which are 1.5 m apart. To negotiate a curve of radius 400 m, the height by which the outer rail should be raised with respect to the inner rail is (Given g = 10 m/s 2 )

1. 4.8 cm
2. 4.2 cm
3. 6.0 cm
4. 5.4 cm

Correct answer: 5.4 cm

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