A string is stretched between fixed points seperated by 75 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this string is

Options

(a) 10.5 Hz
(b) 105 Hz
(c) 1.05 Hz
(d) 1050 Hz

Correct Answer:

105 Hz

Explanation:

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