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Question

The time of reverberation of a room A is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double of those of room A:


A
2
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B
4
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C
12
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D
1
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Solution

The correct option is A 2
Time of reverberation $$\propto$$ $$\frac{V} {A}$$ (sabine's formula)
Where V = volume of room and A = area of room
Area of new room becomes 4 times of A and Volume becomes 8 times of V
Time of reverberation will be 2 seconds

Physics

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