Two waves $Y_{1} = 0.25 \sin(316 t)$ and $Y_{2} = 0.25 \sin(310 t)$ are propagating along the same direction. The number of beats produced per second is:

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

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