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A wire of length L and mass per unit len...

A wire of length L and mass per unit length `6.0xx10^(-3)kgm ^(-1)` is put under tension of 540 N. Two consecutive freequencies that it resonates at are :420 Hz and 490 Hz. Then L in meters is :

A

2.1 m

B

1.1 m

C

4.8 m

D

4.2 m

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A
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