Calculating Mass and Wave Speed in a String System

[jh24628]

tension is maintained in a string as in the figure. the observered wave speed is 26 m/s when the suspended mass is 3.2 kg

what is the mass per unit length of the string in kg/m

what is the wave speed of the suspended mass when it is 2.5 kg. ans in m/s

please help

(the picture has a string attached to a vertical wall then a pulley and then the mass hanging from the pulley)

 

[jh24628]

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i got it