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diff --git a/3864/CH9/EX9.6/Ex9_6.sce b/3864/CH9/EX9.6/Ex9_6.sce
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+clear
+//
+//
+
+//Initilization of Variables
+
+L=3000 //mm //Length of column
+W=800*10**3 //N //Load
+a=1*1600**-1 //Rankine's constant
+FOS=4 //Factor of safety
+sigma=550 //N/mm**2 //stress
+
+//Calculations
+
+//Effective Length
+l=L*2**-1 //mm 
+
+//Let d1=outer diameter & d2=inner diameter
+//d1=5*8**-1*d2
+
+//M.I
+//I=%pi*64**-1*(d1**4-d2**4) //mm**4
+
+//Area of section
+//A=pi4**-1*(d1**2-d2**2) //mm**2
+
+//k=(I*A**-1) 
+//substituting values in above equation 
+//k=1*16**-1*(d1**2-d2**2)
+//after simplifying further we get
+//k=0.2948119.d1
+
+//X=l*k**-1
+//substituting values in above equation and after simplifying further we get
+//X=5087.9898*d1**-1
+
+//Crtitcal Load
+P=W*FOS //N
+
+//From Rankine's Load
+//P2=sigma*A*(1+a*(X)**2)**-1
+//substituting values in above equation and after simplifying further we get
+//d1**4-12156618*d1**4-1.96691*10**8=0
+//Solving Quadratic Equation we get
+//d1**2-12156618*d1-196691000=0
+a=1
+b=-12156.618
+c=-196691000
+
+Y=b**2-4*a*c
+
+d1_1=((-b+Y**0.5)*(2*a)**-1)**0.5 //mm
+d1_2=((-b-Y**0.5)*(2*a)**-1) //mm
+
+d2=5*8**-1*d1_1
+
+//Result
+printf("\n Section of cast iron hollow cylindrical column is:d1_1 %0.2f  mm",d1_1)
+printf("\n                                                  :d2   %0.2f  mm",d2)