...is 340 m/s.? Two loudspeakers located along the x-axis as shown in the figure produce sounds of equal frequency. Speaker 1 is at the origin, while the location of speaker 2 be varied by a remote control wielded by the listener. He notices maxima in the sound intensity when speaker 2 is located at x1 = 0.700 m and 1.15 m, but at no points in between.

http://session.masteringphysics.com/problemAsset/1014422/8/jfk.Figure.P16.59.jpg

What is the frequency of the sound? Assume the speed of sound is 340 m/s.