Calculate the speed of the wave pulse
Distance = 0.90 m
Time = 1.69 s
Speed = 0.90 m / 1.69 s = 0.533 m/s (3 sf)
Is it possible to change the speed of the wave pulse (of the same width)?
Yes. By changing the tension of the string.
When compared to the original wave, the two set-ups has different speed.
Changing the amplitude of the wave will not result in faster speed, only greater displacement.