A piece of wire is in the form of a sect...

A piece of wire is in the form of a sector of a circle of radius 20 cm, subtending an angle `150^@` at the centre. If it is bent in the form of a circle, then what will be its radius?

A

`19/3 cm`

B

`7 cm`

C

`8 cm`

D

None of the above

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