Assume That the Cities Lie on the Same North-South Line $1035 \mathrm { ft } / \mathrm { min }$

Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km.
-A pulley with a diameter of 28 inches is driven by a belt which is moving $1035 \mathrm { ft } / \mathrm { min }$ . To the nearest unit, how many revolutions per minute are made by the pulley?

A) $246 \mathrm { rpm }$
B) $141 \mathrm { rpm }$
C) $239 \mathrm { rpm }$
D) $153 \mathrm { rpm }$