The frequency of Anika's voice is 700 Hz. She calls a boatman who stays in the middle of the river. Anika hears the echo of the sound she created due to the reflection from the other side of the river after 1.6 seconds. The velocity of the sound of that time is 350 m/s. Will the boatman hear the echo of the sound of Anika? Analyze mathematically?
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the boatman will hear th sound
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