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+// Problem 3.4,Page no.55
+
+clc;clear;
+close;
+
+d=10 //mm //Diameter of Punching Hole
+t=4 //mm //Thickness of Mild Steel Plate
+tou=320 //N/mm**2 //Shear Strength of mild Steel
+
+//Calculations
+
+//Force Required for punching the hole
+P=tou*%pi*d*t //N 
+
+//Area of punch in contact with the plate surface
+A=(%pi*4**-1*d**2) //mm*2
+
+//Compressive stress
+sigma_c=P*A**-1 //N/mm*2
+
+//Result
+printf("Force Required for punching the hole is %.2f N",P)
+printf("\n Compressive stress is %.f N/mm^2",sigma_c)