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प्रश्न
A worker lives at a distance of 1.32 km from the factory. If the speed of sound in air be 330 m/s, how much time will the sound of factory siren take to reach the worker?
उत्तर
We have to calculate the time taken by the sound wave to reach the observer.
Given: Velocity of sound ν = 330 m/s
Distance between the observer and the source d = 1,320 m.
We know, `"Time" = "Distance"/"Speed"`
Therefore , time taken by the sound wave to reach the observer is = `1320/330` s
= 4 s
So , the time taken is 4 s .
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