The Speed of Sound Is 340 M/s

Multiple Choice

The speed of sound is 340 m/s. A plane flys horizontally at an altitude of 10,000 m and a speed of 400 m/s. When an observer on the ground hears the sonic boom the horizontal distance from the point on its path directly above the observer to the plane is:

A) 5800 m
B) 6200 m
C) 8400 m
D) 12,000 m
E) 16,000 m