1. The problem statement, all variables and given/known data A loudspeaker at the origin emits sound waves on a day when the speed of sound is 340 m/s. A crest of the wave simultaneously passes listeners at the (x, y) coordinates (40m, 0) and (0, 30m). What are the lowest two possible frequencies of the sound? 2. Relevant equations [tex]\lambda=v/f[/tex] 3. The attempt at a solution I know the answer is 34 and 68 Hz from looking in the back of the book, but I don't understand how to get there. I know that there is some maximum wavelength where there will be crests at a distance of 40m and 30m, but I don't know how to solve for that mathematically (it is 10m by guess and check using common factors).