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+clc;
+clear;
+l=20 //room length in m
+b=15 //room breadth in m
+h=8 //room height in m
+capacity=200 //number of seats in hall
+Absorption_air=0.012 // per m^3
+
+//Coefficient of Absorption (c)
+c_wall=0.09
+c_ceiling=0.04
+c_floor=0.06 //Value given in the sum is wrong which is 0.60
+c_seat=0.64
+
+
+//calcultion
+A1=2*((b*h)+(l*h))*c_wall //in m^2
+A2=(l*b)*c_ceiling //in m^2
+A3=(l*b)*c_floor //in m^2
+A4=(capacity/2)*(1-c_seat) //in m^2
+A5=(capacity/2)*(c_seat) //in m^2
+Volume=l*b*h //in m^3
+A6=Volume*Absorption_air
+T=A1+A2+A3+A4+A5+A6 //Total absorptionin m^2
+T=0.161*(Volume/(T+A6))
+
+mprintf("Reverberation time = %1.2f s",T) //The answer provided in the textbook is wrong.
+