A propagating wave on a taut

$10$ points

string of linear mass density $=0\mathrm{.}03k\frac{g}{m}$ is represented by the wave function $y(x,t)=0\mathrm{.}04sin(kx-20t)$ where $x$ and $y$ are in meters and $t$ is in seconds. If the power associated to this wave is equal to $3\mathrm{.}79$ W $,$ then the wavelength of this wave is:

$=1m$

$=2m$

$=3m$

$=4m$