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question_answer1) A person fires a gun infront of a building 167 m away. If the speed of sound is 334 m/s. Calculate the time in which he hears an echo.
question_answer2) The distance between the observer (source of sound) and wall is 500 m. The observer hear the first echo after 2 sec then velocity of the sound is
question_answer3) A man stands in between two parallel cliffs and fires a gun. Hears two successive echoes after 2 second and 4.5 seconds. What is the distance between the two cliffs.
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