A source emitting sound of frequency 125 Hz is placed in front of a wall at a distance of 3 m from it. A detector is also placed in front of the wall at same distance from wall. If the time between the sound received directly from the source and sound reflected from the wall is 8 m/s, then find the distance between source and detector. Speed of sound in air is 250 m/s.
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Explanation: f= 125hzd =3mt= 8ss
250×8 = 2000m
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