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Infrasonic, Ultrasonic and Audio waves

A man sets hi...

Question

A man sets his watch by a whistle that is $2 k m$ away. How much will his watch be in error. (speed of sound in air $330 m / s)$ .

A

3

second fast

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B

3

second slow

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C

6

second fast

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D

6

second slow

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Solution

The correct option is D $6$ second slow
Time delay due to time taken by sound to reach the clock = 2000 m/ 330 m/s = 6.06 s.
Thus his watch will be slower by 6.06 seconds.

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