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+clc();
+clear;
+//Given :
+l = 200; // in ft
+b = 50; // in ft
+h = 30;// in ft
+alpha = 0.25; //average absorption coefficient
+V = l*b*h; // Volume in ft^3
+S = 2*((l*b)+(l*h)+(b*h)); //total surface area in ft^2
+a = alpha*S;// in sabins
+T = (0.049*V)/a; // reverberation time in s
+//400 people present in the auditorium, 1 person is equivalent to 4.5 sabins
+a1 = a+ 400*4.5; // in sabins
+T1 = (0.049*V)/a1;// reverberation time in s
+printf("For auditorium : %.2f s \n",T);
+printf("When people are present %.2f s",T1);