The angle of a sector of a circle is and the radius of the circle is 21cm. Find the ratio of the circumference of the circle and the length of the area of the sector

The angle of a sector of a circle is and the radius of the circle is 2

1.	The angle of a sector of a circle is and the radius of the circle is 21cm. Find the ratio of the circumference of the circle and the length of the area of the sector
A.	220:77
B.	0.421527777777778
C.	130:77
D.	0.209027777777778
E.	None of these
Answer» B. 0.421527777777778

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The angle of a sector of a circle is and the radius of the circle is 21cm. Find the ratio of the circumference of the circle and the length of the area of the sector

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