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diff --git a/3446/CH3/EX3.3/Ex3_3.sce b/3446/CH3/EX3.3/Ex3_3.sce
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+//Exa 3.3
+//To determine received power and allowable Path loss.
+
+clc;
+clear all;
+
+d=3*1000;//in metres
+Y=4;// path loss exponent
+Pt=4;  //Transmitted power in watts
+f=1800*10^6;//in Hz
+Shadow=10.5;  //in dB
+d0=100;//in metres
+P0=-32;   //in dBm
+
+//solution
+disp("Using equation 3.11 and including shadow effect we get")
+Pr=P0+10*Y*log10(d0/d)+Shadow;
+printf(' Received power is %.1f dBm \n',Pr);
+path_loss=10*log10(Pt*1000)-Pr;
+printf(' Allowable path loss is %.1f dB \n ',path_loss);