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MHT CET 2026 (19 May, Shift 2) · Reflection, Superposition & Interference

Reflection, Superposition & Interference question from MHT CET 2026 (19 May, Shift 2)

Q1MHT CET 2026 · 19 MAY · SHIFT 2Easy

Reflection, Superposition & Interference

A man standing between two parallel cliffs fires a gun. He hear two echos one after 33 second and the other after 55 second. The separation between the two cliffs is 13601360 m, the speed of sound is

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Answer: (c)

  1. Echo time t=2dvt = \frac{2d}{v}, so distances to the cliffs are d1=3v2d_1 = \frac{3v}{2} and d2=5v2d_2 = \frac{5v}{2}
  2. d1+d2=4v=1360⇒v=340 m/sd_1 + d_2 = 4v = 1360 \Rightarrow v = 340\text{ m/s}
  3. So the answer is (c) 340 m/s.
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