The equation of wave is given by $Y = 10^{-2} \sin 2\pi\left(160t - 0.5x + \frac{\pi}{4}\right)$, where $x$ and $Y$ are in m and $t$ in s. The speed of the wave is $\_\_\_\_$ km h$^{-1}$.
The equation of wave is given by $Y = 10^{-2} \sin 2\pi\left(160t - 0.5x + \frac{\pi}{4}\right)$, where $x$ and $Y$ are in m and $t$ in s. The speed of the wave is $\_\_\_\_$ km h$^{-1}$.