Assume That the Cities Lie on the Same North-South Line $36 \pi$

Multiple Choice

Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km.
-Suppose the tip of the minute hand of a clock is 6 inches from the center of the clock. Determine the distance traveled by the tip of the minute hand in 30 minutes. Give an exact answer.

A) $36 \pi$ in.
B) $6 \pi$ in.
C) $12 \pi$ in.
D) $3 \pi \mathrm { in }$ .