Respuesta :

Electromagnetic (EM) frequency = f Hz
Wavelength = λ m
f = c / λ, c = f λ:
[tex]hz = {s}^{ - 1} \\ c = 10.0 \: {s}^{ - 1} \times 2.5 \: m = 25 \: \frac{m}{s} [/tex]