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

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

`1:14`

B

`1:6`

C

`1:9`

D

`1:11`

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The correct Answer is:
D
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