A sound source of constant frequency travels with a constant...

A sound source of constant frequency travels with a constant velocity past an observer. When it crosses the observer the sound frequency sensed by the observer changes from 449 Hz to 422 Hz . If the velocity of sound is

340 \mathrm{~m} / \mathrm{s}

, the velocity of the source of sound is

Options

A $8.5 \mathrm{~m} / \mathrm{s}$
B $10.5 \mathrm{~m} / \mathrm{s}$
C $12.5 \mathrm{~m} / \mathrm{s}$
D $14.5 \mathrm{~m} / \mathrm{s}$

Correct answer

B. $10.5 \mathrm{~m} / \mathrm{s}$

Step-by-step solution

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