The two speakers are producing identical sound waves. The solid lines represent constructive interference regions and the dashed lines represent destructive interference regions. The point labeled 4 is 1228.5 m from the bottom speaker and 1618.5 m from the top speaker.
What is the wavelength of the sound waves?
The Attempt at a Solution
1618.5m-1228.5m=390m not correct
I wasn't really sure, but this is the only thing I could think of.