The Picture on the Right Represents the Wavefronts of a Supersonic

question 75

Multiple Choice

The picture on the right represents the wavefronts of a supersonic flight.The angle $\theta$ = 40 ^$\circ$ .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