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A uniform horizontal circular platform o...

A uniform horizontal circular platform of mass `200 kg` is rotating at 10 rpm about a vertical axis passing through its center. A boy of mass `50 kg` is standing at its edge. If the boy moves to the center of the platform, the frequency of rotation would become

A

7.5 r.p.m

B

12.5 r.p.m.

C

15 r.p.m.

D

20 r.p.m.

Text Solution

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The correct Answer is:
C
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