Answer
$\lambda=1.2m$
Work Step by Step
To find the frequency of the wave, use the formula $$v=f\lambda$$ to solve for frequency $f$. $$f=\frac{v}{\lambda}$$ Substitute known values of $v=2.0m/s$ and $\lambda=1.5m$ to get a frequency of $$f=\frac{2.0m/s}{1.5m}=1.3Hz$$ Use the same equation to solve for the wavelength $\lambda$. $$\lambda=\frac{v}{f}$$ Substitute the known values of $f=1.3Hz$ and $v=1.6m/s$ to get a wavelength of $$\lambda=\frac{1.6m/s}{1.3Hz}=1.2m$$
