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A string of density 7.5 gcm^(-3) and are...

A string of density `7.5 gcm^(-3)` and area of cross - section `0.2mm^(2)` is stretched under a tension of 20 N. When it is plucked at the mid-point, the speed of the transverse wave on the wire is

A

`116 " m s"^(-1)`

B

`40 " m s"^(-1)`

C

`200 " m s"^(-1)`

D

`80 " m s"^(-1)`

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The correct Answer is:
A
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