$T_{1}, T_{2}, T_{3}$ be the reverberation times for an empty auditorium, when the hall has wounded curtains, and when curtains are made to unwound respectively. Arrange the reverberation times in ascending order.

T_{3}, T_{2}, T_{1}

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T_{1}, T_{2}, T_{3}

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T_{2}, T_{3}, T_{1}

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T_{1}, T_{3}, T_{2}

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Solution

The correct option is B $T_{3}, T_{2}, T_{1}$
Unwound curtains will absorb more sound than the wounded curtains. So, more absorption take place when there is no curtain. More the absorption of sound lesser the reverberation time and hence the answer. $T_{1} > T_{2} > T_{3}$

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