How Long Does It Take for a Pulse to Travel Across a Stretched Cord?

[thschica]

I have tried this problem many times using different equations and none of them have worked how do I solve this?

A cord of mass 0.51 kg is stretched between two supports 26 m apart. If the tension in the cord is 148 N, how long will it take a pulse to travel from one support to the other?

 

[Tide]

What, exactly, have you tried?