A travelling wave is described by the equation $y(x, t)=[0.05 \sin (8 x-4 t] \;m$

The velocity of the wave is $.....ms ^{-1}$ [all the quantities are in SI unit]

  • A$4$
  • B$2$
  • C$0.5$
  • D$8$
JEE MAIN 2023, Easy
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