Answer 1

∴ λ = `"v"/"n"=330/330` = 1 m

Directly at the center of two sources of sound, path difference is zero. But since the waves are 180° out of phase, two maxima on either side should be at a distance of `λ/4` from the point at the center. Other maxima will be located each `λ/2` further along.

Thus, the sound intensity will be maximum at ± 0.25, ± 0.75, ± 1.25, ± 1.75 m from the point at the center.