In the ﬁgure 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 1 is 662.15 m from the bottom speaker
and 742.9 m from the top speaker.
What is the wavelength of the sound waves
v = f*lambda?, assuming v = 343 m/s
Pythagorean I believe has to be used but I'm not sure
The Attempt at a Solution
Attempted Pyth. to find distance between speakers, thinking this would be the PLD and then I'd be able to find the wavelength from there. This did not work.
Here's a picture: