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diff --git a/3683/CH1/EX1.5/Ex1_5.sce b/3683/CH1/EX1.5/Ex1_5.sce
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+b=250//width, in mm
+D=550//overall depth, in mm
+Ast=1521//area of steel, in sq mm
+cover=25//in mm
+d=D-cover//effective depth, in mm
+sigma_cbc=7//in MPa
+sigma_st=140//in MPa
+m=13.33//modular ratio
+//to find critical depth of neutral axis
+Xc=d/(1+sigma_st/(m*sigma_cbc))//in mm
+//to find actual depth of neutral axis using b(x^2)/2=mAst(d-x)--> this will become of the form px^2+qx+r=0
+p=b/2
+q=m*Ast
+r=-m*Ast*d
+x=(-q+sqrt(q^2-4*p*r))/(2*p)//in mm
+//x>Xc; hence beam is over-reinforced
+Mr=b*x*sigma_cbc/2*(d-x/3)//in N-mm
+mprintf("Moment of resistance of the beam=%f kN-m",Mr/10^6)