When two sound waves travel in the same direction in a medium, the...

Standard equation $y(x, t)=A \cos$\left(\frac{\omega}{V} x-\omega t\right)$From any of the displacement equation Say$\mathrm{y}_1 \frac{\omega}{\mathrm{V}}=0.50 \pi$and$\omega=100 \pi \therefore \frac{100 \pi}{\mathrm{V}}=0.5 \pi \therefore \mathrm{V}=\frac{100 \pi}{0.5 \pi}=200 \mathrm{~m} / \mathrm{s}