Sound WavesHard

Question

A whistle giving out 450 Hz approaches a staionary observer at a speed of 33 m/s. The frequncy heared by the observer (in Hz) is (Speed of sound = 300 m/s)

Options

A.409
B.429
C.517
D.500

Solution

Source is moving towards the observer
f′ = f
f′ = 500Hz.

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