An Airplane Flying Faster Than the Speed of Sound of 340

Multiple Choice

An airplane flying faster than the speed of sound of 340 m/s produces a shock wave that makes an angle of 50° with the direction the plane is flying.What is the speed of the plane?

A) 490 m/s
B) 530 m/s
C) 390 m/s
D) 440 m/s
E) 405 m/s