A person with vibrating tuning fork of frequency 338 Hz is moving towards a vertical wall with a speed of 2 ms-1. Velocity of sound in air is 340 ms-1. The number of beats heard by that person per second is
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A person with vibrating tuning fork of frequency 338 Hz is moving towards a vertical wall with a speed of 2 ms-1. Velocity of sound in air is 340 ms-1. The number of beats heard by that person per second is