The frequency of echo will be...|SOUND WAVE|JEEMAIN 2022

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JEE Main 2022_

S1_2807

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The frequency of echo will be _______ Hz if the train blowing a whistle of frequency 320 Hz is moving with a velocity of 36 km/h towards a hill from which an echo is heard by the train driver. Velocity of sound in air is 330 m/s.

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