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Two metallic cylinder made of same mater...

Two metallic cylinder made of same material and radii r and 2r are joined as shown in figure. If top end is ved and lower end of cylinder B is twisted by angle e, then angle of twist for cylinder A is (both cylinder have fixed and

A

`(15)/(16)theta`

B

`(16)/(15)theta`

C

`17theta`

D

`(16)/(17)theta`

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