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A man standing between two parallel cliffs fires a gun. He hears two echoes, one after 2 seconds and the other after 4 seconds. What is the distance between the cliffs if the speed of sound in air is 330 m/s ? |
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Answer» ta : - = 2 s , = 4 s , v = 330 m/sLet and be the distance of the two cliffs from the manTime TAKEN by SOUND to cover the L distance between the man and a cliff distance between the man and the first cliff is = v = (330 m/s) = 330 mand the distance between the man and the second cliff is = v = (330 m/s) = 660 mThe distance between the two parallel cliffs 330 m + 660 m = 990 m |
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