Final answer:
The speed of the wave is 360 m/s.
Step-by-step explanation:
The speed of a wave can be calculated using the formula:
 
Speed = Frequency x Wavelength
 
In this case, the frequency is given as 1200 Hz and the wavelength is 0.300 meters. By substituting these values into the formula, we can calculate:
 
Speed = 1200 Hz x 0.300 m = 360 m/s
 
Therefore, the speed of the wave is 360 m/s.