$A$ transverse wave propagating along the $x-$ axis is represented by $y(x,t) = 8.0 \sin \left( 0.5\pi x - 4\pi t - \frac{\pi}{4} \right)$,where $x$ is in metres and $t$ is in seconds. The speed of the wave is ..... $m/s$.
- A$8$
- B$4\pi$
- C$0.5\pi$
- D$\frac{\pi}{4}$
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MediumAIIMS 2001
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