Two harmonic sound waves are moving in x-direction. Displacement of particles are given by y₁ = A cos (ωt - kx) and y₂ = 0.8 A cos (ωt + kx). The two waves are superimposed. If Bulk modulus of medium is Bo and atmospheric pressure is Po then amplitude of pressure variation at x= 0, will be ____
(A) 0.2 B₀kA
(B) 0.4 B₀kA
(C) 1.8 B₀kA
(D) None of these.