Solve the Problem $120 \mathrm {~km} / \mathrm { h }$

Multiple Choice

Solve the problem.
-An airplane travels at $120 \mathrm {~km} / \mathrm { h }$ for $5 \mathrm { hr }$ in a direction of $312 ^ { \circ }$ from Greenville. At the end of this time, how far west of Greenville is the plane (to the nearest kilometer) ?

A) $540 \mathrm {~km}$
B) $807 \mathrm {~km}$
C) $446 \mathrm {~km}$
D) $401 \mathrm {~km}$