A man stands between two parallel cliffs and fires a gun. He hears the first echo after 1.5 s and the second echo after 3.5 s. Find the distance between the cliffs. Take the speed of sound in air as 340 m s⁻¹.
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Question

A man stands between two parallel cliffs and fires a gun. He hears the first echo after 1.5 s and the second echo after 3.5 s. Find the distance between the cliffs. Take the speed of sound in air as 340 m s⁻¹.

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G1 Physics · Accepted Answer

Step 1: Use v = √(B/ρ) in a fluid, v = √(Y/ρ) for longitudinal waves in a solid, or v = √(γRT/M) for an ideal gas. Step 2: Form any required ratio before substituting values. Step 3: Evaluate with the data given. Final: C: 850 m.