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Answer 1 · 2016-10-01T11:01:14

Length of the arc is #3.14 cm#

Let #CD=3 cm# be the chord of the arc. #O# be the centre of the circle, #OC=OD=r=3cm#.

The triangle OCD is equilateral triangle.
So the angles of the triangle are of #60^0# each.

The arc CD subtends #60^0# angle at the centre.
Length of the arc is #l=2*pi*r*60/360=2*22/7*3/6=22/7=3.14 cm#[Ans]