Which equation should be used to calculate the speed of a wave?

Speed (c) = wavelength (λ) * frequency (f)

Explanation:

The wavelength denoted by (λ), is the distance between two successive waves. The wavelength of a wave us calculated by using the formula: (λ) = c/f.

Where; λ = wavelength

c = velocity or speed

f = frequency

Based on this, the speed of a wave can be calculated by making (c) the subject of the formula in λ=c/f.

We have; c = λf

Hence, the speed of a wave equals the wavelength (λ) multiplied by the frequency (f).