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Territorial Army Sound and Echo — practice questions

Explore 1 free Sound and Echo questions in Territorial Army Science. Open each question or exercise to read its content, reference answers and available explanation.

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Sound and Echo questions and exercises with answers

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A person claps near a cliff and hears the echo after 6 s. If the speed of sound is 346 m/s, how far is the cliff from the person?Read the answer and worked solution →

Worked practice questions

A person claps near a cliff and hears the echo after 6 s. If the speed of sound is 346 m/s, how far is the cliff from the person?

  1. 1083 m
  2. 2076 m
  3. 1038 m
  4. 2706 m
Show answer and solution

Correct answer: C. 1038 m

1. Sound travels to the cliff and back, so total distance = v × t = 346 × 6 = 2076 m. 2. This is twice the cliff distance. 3. Cliff distance = 2076 / 2 = 1038 m. _Source: RRB Group D CEN-02/2018 PYQ, Q.3._

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