The speed of sound is 343 m/s. A sound wave of frequency 5,700 Hz from a distant source strikes a very high fence of total length 20 m with 2.0 cm...

The speed of sound is 343 m/s. A sound wave of frequency 5,700 Hz froma distant source strikes a very high fence of total length 20 m with2.0 cm wide vertical gaps spaced 1.0 cm apart. At what angle (indegrees) is the third-order (m=3) maximum located?