Waves

A stationary wave is represented by
\(\mathrm{y}=10 \sin \left(\frac{\pi \mathrm{x}}{4}\right) \cos (20 \pi \mathrm{t})\)
where \(\mathrm{x}\) and \(\mathrm{y}\) are in \(\mathrm{cm}\) and \(\mathrm{t}\) in second. The distance between two consecutive nodes is