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A wire of length one metre under a certa...

A wire of length one metre under a certain initial tension emits a sound of fundamental frequency 256 Hz. When the tesnion is increased by 1 kg wt , the frequency of the fundamental node increases to 320 Hz. The initial tension is

A

`16//9`

B

`3//4`

C

`4//3`

D

None of these

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A
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