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Manipal MET2012PhysicsWaves and Sound

A man, standing between two cliffs, claps his hands and starts hearing a series of echoes at intervals of one second. If the speed of sound in air is 340 ~ms ⁻¹ , the distance between the cliffs is

Options

  1. A680 m
  2. B1700 m
  3. C340 m
  4. D1620 m

Correct answer

C. 340 m

Step-by-step solution

Let the distance between the two cliffs be d . Since, the man is standing midway between the two cliffs, then the distance of man from either end is d / 2 . The distance travelled by sound (in producing an echo) 2 d 2 =v t d=340 1=340 ~m

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