Let f1 and f2 be the frequencies of the tuning forks A and B respectively. Then, f1 – f2 = 6 ………….(1)
But tuning fork A is in resonance with a closed pipe of length 15 cm
Similarly tuning fork B is in resonance with an open pipe of length 30.5 cm
Frequency of the tuning fork A is
Frequency of the tuning fork B is