The speed of sound in a certain metal is VM. One end of along pipe of that metal of length L is struck a hard blow.A listener at the other end hears two sounds, one from the wavethat travels along the pipe’s metal wall and the other from thewave that travels through the air inside the pipe. 

(a) If v is thespeed of sound in air, what is the time interval t between the arrivalsof the two sounds at the listener’s ear? 

(b) If t = 1.00 s andthe metal is steel, what is the length L?