Accepted Answer
-- Speed = (distance) / (time to cover the distance) = 840/2.5 = 336 m/s-- Frequency = (speed) / (wavelength) = 336/0.70 = 480 Hz.
-- Speed = (distance) / (time to cover the distance) = 840/2.5 = 336 m/s-- Frequency = (speed) / (wavelength) = 336/0.70 = 480 Hz.