Find the wavelength of the sound.

[alevis]

Two speakers , each producing a pure tone of 1000Hz, are separated by 4m and are placed against one wall of a 15m wide room. You walk along the opposite wall of the room and hear the locations of the maxima and minima interference patterns

a.)Find the wavelength of the sound.
b.)Find the total separation distance between the -4 and the +4 maxima and minima locations.
c.)If you slowly walk at 0.45m/s, find the amount of time to walk between the locations in part b.

 

[Redbelly98]

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(From https://www.physicsforums.com/showthread.php?t=5374 )