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• Objective question in Physics
  A boy standing in front of a wall at a distance of 85m produces 2claps/s. he notices that the sound of his clapping coincides with the echo. The echo is heard only once when clapping is stopped. V=? a) 330 m/s b) 340 m/s c) 3 ...
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  asked2014-06-14 00:01:58