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A string is stretched betweeb fixed poin...

A string is stretched betweeb fixed points separated by `75.0 cm`. It observed to have resonant frequencies of `420 Hz` and `315 Hz`. There are no other resonant frequencies between these two. The lowest resonant frequency for this strings is

A

105 Hz

B

155 Hz

C

205 Hz

D

10.5 Hz

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The correct Answer is:
A
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