Question 973304
The central angle between 60 degrees n latitude
and 90 degrees north latitude (North Pole)is 30 degrees,
or {{{(pi)/6}}} radians. The length of the arc is radius
times angle in radians, or:
.
{{{((pi)/6)(3960mi)=660(pi)mi}}}
.
ANSWER: The distance along the surface is {{{660(pi)}}} miles.