A non-uniform wire of length \( L \) and mass \( M \) has a variable linear mass density given b...

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A non-uniform wire of length \( L \) and mass \( M \) has a variable linear mass density given by \( \mu=k x \), where \( x \) is distance from one end of wire and \( k \) is a constant. Find the time taken by a pulse starting at one end to reach the other end when the tension in the wire is \( T \).
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