Solution:
The wavelength is the distance or length between two successive crests or troughs of a wave. The frequency (f) of a repeated event is the number of occurrences per unit of time. Hertz (Hz) is its Sl unit. Velocity (v) is defined as the rate of change of a body's displacement with respect to time. metre per second is the SI unit.
We know that speed formula in terms of wavelength and frequency
Speed (v)= wavelengthfrequency (f).
According to question given that,
Wavelength
Frequency
Speed
The distance travelled inspeedtime
Hence option 1 is correct.