The equation of progressive wave is $y = 0.2\sin 2\pi \left[ {\frac{t}{{0.01}} - \frac{x}{{0.3}}} \right]$, where $x$ and $y$ are in metre and $t$ is in second. The velocity of propagation of the wave is .... $m/s$
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(a) $v = \frac{{{\rm{co - efficient\, of\, }}t}}{{{\rm{co - efficient\, of\, }}x}} = \frac{{2\pi /0.01}}{{2\pi /0.3}} = 30\,m/s$
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