The fundamental frequency of vibration of a string stretched between two rigid support is $50\,Hz$. The mass of the string is $18\,g$ and its linear mass density is $20\,g / m$. The speed of the transverse waves so produced in the string is $..........\,ms ^{-1}$
  • A$90$
  • B$45$
  • C$30$
  • D$15$
JEE MAIN 2023, Medium
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