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Three rings each of mass m and radius r are so placed that they touch each other. The radius of gyration of the system about the axis as shown in the figure is

A

`sqrt((6)/(5))r`

B

`sqrt((5)/(6))r`

C

`sqrt((6)/(7))r`

D

`sqrt((7)/(6))r`

Text Solution

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The correct Answer is:
D
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