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An auditorium has volume of 10^5 m^3 and...

An auditorium has volume of `10^5 m^3` and surface area of absorption `2xx10^4 m^2`. Its average absorption coefficient is 0.2. The reverberation time of the auditorium is second is

A

6.5

B

5.5

C

4.25

D

3.25

Text Solution

Verified by Experts

The correct Answer is:
C
Reverbertion Time, `T=(0.17v)/(a "s")`
A obsorption coefficent =0.2, `s=2xx10^4m^2,v=10^5m^3`
`:. T =(0.17xx10^5)/(2xx10^4xx0.2)=4.25s`
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