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A tuning fork of frequency 340 H(Z) is s...

A tuning fork of frequency `340 H_(Z)` is sounded above an organ pipe of length `120 cm` . Water is now slowly poured in it . The minimum height of water column required for resonance is ( speed of sound in air = `340 m//s`)

A

`15 cm`

B

`25 cm`

C

`30 cm`

D

`45 cm`

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The correct Answer is:
D
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