Answer: Option 'C' is correct.
Step-by-step explanation:
Since we have given that
[tex]\theta=\frac{2\pi}{7} \\\\r=3\ cm[/tex]
An arc is a part of total circumference of circle and length of that arc is the measurement of linear distance.
Since we know the formula for "Length of an arc " , we get
[tex]L=r\times \theta\\\\L=\frac{2\pi}{7}\times 3\\\\L=\frac{6\pi}{7}[/tex]
Hence, Option 'C' is correct.
