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Jai chand
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Asked: 2021-11-01T10:11:40+00:00 In:

The material generally used for sound proofing of rooms like a recording studio and auditorium, etc. is:

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0%a. cotton
0%b. coir
0%c. wood
100%d. styro foam ( 2 voters )
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    1. d. styro foam

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