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A cyclist is moving in a circular track of radius 80 m, with a velocity of 36 km/hour. In order to keep his balance, he has to lean inwards from the vertical through an angle q. If g = 10 m/s2, then q is given by

tan–1 (2)
tan–1 (4)
tan–1 $\dfrac{1}{4}$
tan–1 $\dfrac{1}{8}$
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