Two tuning forks $A$ and $B$ sounded together give $6$ beats per second. With an air resonance tube closed at one end, the two forks give resonance when the two air columns are $24 cm$ and $25 cm$ respectively. Calculate the frequencies of forks.
  • A$120\,Hz , 124\,Hz$
  • B$110\,Hz ,114\,Hz$
  • C$150\,Hz , 144\,Hz$
  • D$170\,Hz , 118\,Hz$
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