The standard equation of a transverse wave is given by y=Asin(ωt+kx+ϕ)
Comparing this with the given equation y=3sin(36t+0.018x+π/4), we get the wave number k=0.018 cm−1.
The least distance between two successive crests is the wavelength λ of the wave.
We know that k=λ2π
λ=k2π=0.0182×3.14
λ=0.0186.28=186280=348.88 cm
Rounding to the nearest integer, we get 349 cm.
Answer: 349