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MHT CET 2025 (22 Apr, Shift 1) · Reflection, Superposition & Interference

Reflection, Superposition & Interference question from MHT CET 2025 (22 Apr, Shift 1)

Q5MHT CET 2025 · 22 APR · SHIFT 1Easy

Reflection, Superposition & Interference

A person standing between two parallel cliffs fires a gun and hears two echoes, first echo after 1 second and the second echo after 3 second. The distance between the two cliffs is (Velocity of sound $= 340\text{ m/s}$ )

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Answer: (b)

$d_1 = \frac{v t_1}{2} = \frac{340 \times 1}{2} = 170\text{ m}$ , $d_2 = \frac{340 \times 3}{2} = 510\text{ m}$
Separation $= 170 + 510 = 680\text{ m}$
So the answer is (b) 680 m.

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