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A wire whose mass per unit length is 0.2kg/m is stretched with tension of 800N. The...

A wire whose mass per unit length is 0.2kg/m is stretched with tension of 800N. The wire's fundamental frequency is in tune with first overtone of a pipe 2.5m long that is closed at one end . The speed of sound is 350m/s. How long is the wire?

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