The speed of an electromagnetic wave is constant and is equal to the speed of light, which is approximately 299,792,458 meters per second (m/s).

This speed is independent of the frequency or wavelength of the electromagnetic wave.

Here's why:

* The relationship between frequency, wavelength, and speed: The speed of an electromagnetic wave (c) is related to its frequency (f) and wavelength (λ) by the equation: c = fλ.

* Constant speed of light: In a vacuum, the speed of light is a fundamental constant. This means that regardless of the frequency or wavelength of the electromagnetic wave, its speed remains the same.

Therefore, even though the frequency and wavelength of the electromagnetic wave in your question are given, its speed is still the speed of light, approximately 299,792,458 m/s.