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A piano wire having a diameter of 0.90 m...

A piano wire having a diameter of 0.90 mm is replaced by another wire of the same material but with a diameter of 0.93 mm. If the tension of the wire is kept the same, then the percentage change in the freuency of the fundamental tone is

A

`3 %`

B

`3.2%`

C

`-3.2 %`

D

`-3 %`

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