Multiple Choice
The picture on the right represents the wavefronts of a supersonic flight. The angle = 40 . If the speed of sound is 300 m/s, what is the speed of the plane? 
A) 360 m/s
B) 330 m/s
C) 300 m/s
D) 390 m/s
E) 470 m/s
Correct Answer:

Verified
Correct Answer:
Verified
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