Two sound waves with wavelengths $5.0\,\, m$ and $5 .5\,\, m$ respectively, each propagate in a gas with velocity $330\,\, m/s.$ We expect the following number of beats per second. 
  • A$6$
  • B$12$
  • C$0$
  • D$1$
AIPMT 2006, Medium
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