Answer:
360 miles.
Step-by-step explanation:
Wave speed = 6 miles/minute
Time period = 60 minutes
Wave speed = Wavelength/Time period
6 miles/minute = Wavelength / 60 minutes
6 miles x 60 minutes = Wavelength x 1 minute
360 miles = Wavelength
Therefore, the length between wave peaks (wavelength) of the tsunami waves in this scenario is 360 miles.
Hope it help! :)