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AP EAMCET201724 Apr 2017Evening ShiftPhysicsWaves and SoundActual

A stationary source of sound A is producing sound of frequency 170 ~Hz . Another source of sound B producing sound of frequency 240 ~Hz is moving towards the source A on a straight path with a uniform speed of 20 ~ms ⁻¹ . An observer between A and B is moving towards the source A along the straight path BA . If the number of beats heard by the observer is zero, the speed of the observer is ____ ms ⁻¹ . (Speed of soun

Options

  1. A40
  2. B34
  3. C68
  4. D30

Correct answer

C. 68

Step-by-step solution

No solution. Refer to answer key.

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