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Question

A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity of sound waves is:
  1. 1000


Solution

The correct option is A 1000
Frequency is the number of waves produced per second and wavelength is distance between two consecutive compressions or rarefactions.
Velocity of wave, v = μ×λ
So, velocity v = 400×2.5
v=1000 ms1

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