Person between two cliffs fires a gun and hears two echoes: distance between the cliffs
The same question, asked 2 times: 22 Apr 2025 S1*, 18 Apr 2026 S2. Every wording below, oldest first.
Try each one first, then open its answer.
Question 1
22 Apr 2025 S1
9A 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 )Tap an option to check your answer.
Question 2
18 Apr 2026 S2
124A person standing between two parallel cliffs fires a gun and hears two echoes, first echo after 1 second and second echo after 3 second. The distance between the two cliffs is (The velocity of sound m/s)Tap an option to check your answer.