Physics

Problem

An auditorium is maintained at

30^{\circ}\text{C}

. Taking the speed of sound to vary with temperature as

v = 331 + 0.6T\,\text{m}\,\text{s}^{-1}

(where

T

is in

^{\circ}\text{C}

), what is the largest allowed separation between any two parallel walls if echoes are to be avoided? a)

34.9\,\text{m}

17.4\,\text{m}

1.74\,\text{m}

16.6\,\text{m}