initial commit / add all books

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+// Problem 1.2,Page No.9
+
+
+clc;clear;
+close;
+
+//Area-1
+a_1=6 //cm**2 
+x_1=3 //cm
+y_1=0.5 //cm
+
+//Area-2
+a_2=6 //cm**2
+x_2=2.671 //cm
+y_2=3 //cm
+
+//Area-3
+a_3=16 //cm**2
+x_3=1 //cm
+y_3=5 //cm
+
+
+//Calculation
+
+
+X_bar=(a_1*x_1+a_2*x_2+a_3*x_3)*(a_1+a_2+a_3)**-1 //cm
+Y_bar=(a_1*y_1+a_2*y_2+a_3*y_3)*(a_1+a_2+a_3)**-1 //cm
+
+
+//Result
+printf("The centre of gravity of section is %.2f cm",X_bar)
+printf("\n The centre of gravity of section is %.2f cm",Y_bar)