An Airplane Flying at 115 M/s Due East Makes a Gradual

Multiple Choice

An airplane flying at 115 m/s due east makes a gradual turn following a circular path to fly south. The turn takes 15 seconds to complete.
-What is the radius of the curve that the plane follows in making the turn?

A) 280 m
B) 350 m
C) 830 m
D) 1100 m
E) 1600 m