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+P=5.3*10^4;//ambient pressure in N/m^2
+T=253;//ambient temperature in K
+R=287;// gas constant for dry air in J/Kg.K
+D=P/(R*T)
+//as we do not have this value of pressure and density from standard table we will take two nearest value and interpolate to get the desired result.  
+H1=5100;
+P1=5.331*10^4;//pressure corresponding to H1
+H2=5200;
+P2=5.2621*10^4;//pressure corresponding to H2
+Hp=H1+[(H2-H1)*((P1-P)/(P1-P2))]//pressure altitude corresponding to p
+H3=5000;
+D3=0.73643;//density corresponding to H3 in Kg/m^3
+H4=5100;
+D4=0.72851;//density corresponding to H4 in Kg/m^3
+Hd=H3+[(H4-H3)*((D3-D)/(D3-D4))] //density altitude
+\ No newline at end of file