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A sphere of radius r is undergoing pure rolling with constant angular velocity on a fixed
curved surface of radius R with O as centre as shown. The ratio of the angle through which
line PC rotates to the angle through which line OC rotates is :
3.
R+r
R-r
R+r
R-r
(A)
r
(B)
r
(C)
R
(D)
R

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