Sounds Numerical

1.Calculate the speed of sound in air if the frequency of a sound wave is 440 Hz and its wavelength is 0.78 m.

v=n×λ
v = speed of sound, n = frequency, λ is the wavelength.
n=440 Hz
λ=0.78m
Now,

v=440Hz×0.78m
v=343.2m/s
sound in air is approximately 343.2 m/s.