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+//Determine centroid
+//refer fig. 9.14
+//This figure is divided into three simple figures
+A1=3*4/2  //m^2
+A2=6*4  //m^2
+A3=%pi*(1/2)*2^2  //m^2
+A=A1+A2+A3  //m^2
+//Co-ordinates of centroid
+x1=6+3/3  //m
+ya=4/3  //m
+x2=3  //m
+y2=2  //m
+R=2
+x3=(-4*R)/(3*%pi)  //m
+y3=2  //m
+xbar=(A1*x1+A2*x2+A3*x3)/(A)  //m
+ybar=(A1*ya+A2*y2+A3*y3)/(A)  //m
+printf("\nxbar=%.3f m\nybar=%.3f m",xbar,ybar)
+
+
+