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A rod of length 20 cm is bent in thè for...

A rod of length `20 cm` is bent in thè form of an arc. If the central angle of this arc.is `60^(circ)`, then find the perimeter of the circle?

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Length of the arc
=20 ~cm=2 pi r xx 60/360
2 pi r=6 xx 20=120 cm
`therefore` Perimeter of the circle `=120 ~cm`
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