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Question

An object producing a pitch of 1200Hz is moving with a velocity of sound is 50m/s.towards a stationary person. The velocity of sound is 350m/s. The frequency of sound heard by the stationary person is :

Options

A.1250 Hz
B.1050 Hz
C.700 Hz
D.1400 Hz

Solution

If na be the apparent frequency, then
na = n ×
= 1400 Hz

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