Physics - Wave on String Question with Solution | TestHub

A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse displacement is given by,$y\left(x, t\right)=0.5\sin \left(\frac{5\pi }{4}x\right)\cos \left(200\pi t\right)$. What is the speed of the travelling wave moving in the positive$x$direction? ($x$and$t$are in meter and second, respectively)