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A 12 m long wire is cut into two pieces,...

A 12 m long wire is cut into two pieces, one of which is bent into a circle and the other into a square enclosing the circle. What is the radius of the circle ?

A

`12/(pi/4)`

B

`6/(pi+4)`

C

`3/(pi+4)`

D

`6/(pi+2sqrt2)`

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