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diff --git a/1616/CH2/EX2.7/ex2_7.sce b/1616/CH2/EX2.7/ex2_7.sce
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+//ex2.7  from the previous problem find instantaneous voltage and current at x=50cm and t=1nsec & peak voltage and current at x=1m
+f=2e9;
+w=2*%pi*f;
+x=0.5;
+t=1e-9;
+// at x=0 t=0 v(t)=2V 
+Vpositive=2;
+// at 0=60,x=0,t=0 
+Vnegative=1;
+o=%pi/3;
+k=sqrt((0.1+%i*w*0.01e-6)*(0.01+%i*w*1e-10));
+a=real(k);
+b=imag(k);
+v=Vpositive*exp(%i*0)*exp(-a*x)*exp(%i*(w*t-b*x))+Vnegative*exp(%i*o)*exp(a*x)*exp(%i*(w*t+b*x));
+V=real(v);
+disp('Therefore, at x= 50c and t=10nsec , we get');
+disp('instantaneous value of voltage is= '+string(V)+'V');
+zo=complex(10,0.0358);
+i=real(Vpositive*exp(0)*exp(-a*x)*exp(%i*(w*t-b*x))/zo-Vnegative*exp(%i*o)*exp(a*x)*exp(%i*(w*t+b*x))/zo);
+disp('instantaneous value of current is= '+string(i)+'A');