A right circular cone with dimensions (R, h) as shown in figure is rolled about the Z-axis keeping the point A fixed at the origin. The cone is rolled without slipping till the point B on cone which is in touch with the ground at the moment shown comes in contact with the ground again. The angle covered by the cone (in radians) about point A over x-y plane, while point B completes one circle as explained above is Find n. R=9 cm h-12 cm

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