This question involves the concepts of wave speed, wavelength, and frequency.
The frequency of the wave will be "53.85 Hz".
The relationship between speed, wavelength, and frequency of the wave can be given by the following formula:
[tex]v=f\lambda\\\\f =\frac{v}{\lambda}[/tex]
where,
Therefore,
[tex]f=\frac{280\ m/s}{5.2\ m}\\\\[/tex]
f = 53.85 Hz
Learn more about wavelength here:
https://brainly.com/question/7143261