Question

A piece of wire 20 cm long is bent in to
the form of an arc of a
circle sustending an angle of 60 degree at its centre. find the radius of a circle .​

Answer 1

Answer:

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Answer 2

Answer:

We are given that a piece of wire 20 cm long is bent into the form of an arc of a circle subtending an angle of 60 degrees at its centre. So, here the arc length will be the same as 20 cm, as shown in the figure below. So we get the required radius of the circle as r=60πcm. Hence, the correct answer is option A.