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+// Problem 11.4,Page no.275
+
+clc;clear;
+close;
+
+D=40 //cm //External diameter of column
+d=30 //cm //Internal diameter of column
+e=20 //cm //Eccentricity
+P=150 //KN //Load
+
+//calculations
+
+A=%pi*4**-1*(D**2-d**2) //cm**2 //Area of the column
+Z=%pi*32**-1*((D**4-d**4)*D**-1) //cm**3 //Section modulus
+M=P*10**3*e //N*cm //Moment
+
+sigma_r_max=((P*10**3*A**-1)+(M*Z**-1)) //N/cm**2 //Max stress 
+sigma_r_min=((P*10**3*A**-1)-(M*Z**-1)) //N/cm**2 //Min stress 
+
+//Result
+printf("Max intensities of stress in the section is %.2f",sigma_r_max);printf(" N/cm**2")
+printf("\n Min intensities of stress in the section is %.2f",sigma_r_min);printf(" N/cm**2(tension)")