A horse is tied to a post by a rope. If the horse moves along a circular path always keeping the ripe stretched, covers 66 m and traces 120° at the centre, then find the length of the rope.

A horse is tied to a post by a rope. If the horse moves along a circular path always keeping the ripe stretched, covers 66 m and traces 120° at the centre, then find the length of the rope.
1). 30 m
2). 45 m
3). 31.5 m
4). 60 m

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