A hollow cylinder of inner radius 3 cm a...

A hollow cylinder of inner radius 3 cm and outer radius 5 cm and a solid cylinder of radius 2 cm are subjected to the same force. If they are made of same material and of same length, then the ratio of their elongations is

A

`1:1`

B

`1:2`

C

`1:4`

D

`2:3`

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The correct Answer is:

3

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