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A source and a detector move away from each other in absence of wind with a speed of 20m/s with respect to the ground. If the detector detects a frequency of 1800 Hz of the sound coming from the source, then the original frequency of source considering speed of sound in air 340 m/s will be ……Hz.

0 2 Views | Posted 3 months ago
Asked by Shiksha User

  • 1 Answer

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    Answered by

    Vishal Baghel | Contributor-Level 10

    3 months ago

    f ' = 3 4 0 − 2 0 3 4 0 + 2 0 × f 0

    ⇒ 1 8 0 0 = 3 2 0 3 6 0 × f 0

    f0 = 2025 Hz

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