S.177 T.464


\alpha=90-66{,}5=23{,}5°
\sin23{,}5=\frac{x}{6370}
x=2540{,}031...\approx2540\left(km\right)
2\pi\cdot2540=5080\pi=15959{,}290...\approx16000\left(km\right)
V:\ n.\ 16000km