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
• B. 4
• C. $\frac{1}{2}$
• D. 1

Answer 1

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