$A$ progressive wave of frequency $50\text{ Hz}$ is travelling with velocity $350\text{ m/s}$ through a medium. The change in phase at a given time interval of $0.01\text{ s}$ is

  • A
    $\frac{\pi}{4}\text{ rad}$
  • B
    $\frac{\pi}{2}\text{ rad}$
  • C
    $\pi\text{ rad}$
  • D
    $\frac{3\pi}{2}\text{ rad}$

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