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A spring of force constant k is cut into...

A spring of force constant `k` is cut into lengths of ratio `1 : 2 : 3`. They are connected in series and the new force constant is k'. Then they are connected in parallel and force constant is k''. Then k' : k" is :

A

`1:6`

B

`1:9`

C

`1:11`

D

`1:14`

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The correct Answer is:
C
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