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+// Problem no 15.1,Page no.351
+
+clc;clear;
+close;
+
+D=0.8 //m //Diameter of Shell
+L=3 //m //Length of shell
+t=0.01 //m //thickness of metal
+E=200*10**9 //Pa 
+p=2.5*10**6 //Pa //Internal Pressure
+m=4 //Poisson's ratio
+
+//Calculation
+
+sigma_1=p*D*(2*t)**-1 //N/m**2 //Hoop stress
+sigma_2=p*D*(4*t)**-1 //N/m**2 //Longitudinal stress
+
+e_1=1*E**-1*(sigma_1-sigma_2*m**-1) //Hoop strain
+e_2=1*E**-1*(sigma_2-sigma_1*m**-1) //Hoop strain
+
+d=e_1*D*100 //cm //Increase in Diameter
+l=e_2*L*100 //cm //Increase in Length
+
+dell_v=2*e_1+e_2 //Volumetric strain
+V=dell_v*%pi*4**-1*D**2*L*10**6 //cm**3 //Increase in Volume
+
+//Result
+printf("Change in Diameter is %.3f cm",d)
+printf("\n Change in Length is %.3f cm",l)
+printf("\n Change in Volume is %.2f",V);printf(" cm**3")