Step-by-step explanation:
[tex] \frac{\pi}{3} = 60 \: degrees[/tex]
[tex]arc HJ = 2\pi .r (\frac{60}{360} )[/tex]
[tex] = 2\pi \times 6 \times \frac{60}{360} [/tex]
[tex] = 2\pi[/tex]
option D
