A ring of mass M and radius R is rotating with angular speed 
about a fixed vertical axis passing through its centre O with two-point masses each of mass 
at rest at O. These masses can move radially outwards along two massless rods fixed on the ring as shown in the figure. At some instant the angular speed of the system is 
and one of the masses is at a distance of 
from O. At this instant the distance of the other mass from O is
Text Solution
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Using conservation of angular momentum
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