The extension in a string obeying Hooke's law is $x.$ The speed of sound in the stretched string is $v.$ If the extension in the string is increased to $1.5x$, the speed of sound will be
  • A$1.22 \,v$
  • B$0.61 \,v$
  • C$1.50 \,v$
  • D$0.75 \,v$
IIT 1996, Diffcult
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