Finding tension given speed of a pulse, length, radius, and time

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Homework Statement


A ski gondola is connected to the top of a hill by a steel cable of length 580 m and diameter 1.5 cm. As the gondola comes to the end of its run, it bumps into the terminal and sends a wave pulse along the cable. It is observed that it took 19 s for the pulse to travel the length of the cable and then return.

(a) What is the speed of the pulse?
61.05263158 m/s
(b) What is the tension in the cable?
? N


Homework Equations


I have no idea.



The Attempt at a Solution


I don't even know where to start. I don't even see how you can calculate tension with the information. Any help is appreciated. Thank you!
 
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