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The volume of a room is 600 text end text m to the power of 3 end exponent. The wall area of the room is 220 text end text m to the power of 2 end exponent. The floor and ceiling have area of 120 text end text m to the power of 2 end exponent each. The absorption coefficients of walls, floor and ceiling are 0.03,0.8 and 0.06 respectively. Calculate the reverberation time

  1. 0.93 s    
  2. 0.5 s    
  3. 0.2 s    
  4. 1.8 s    

The correct answer is: 0.93 s

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