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//Centroid of dam
//refer fig. 9.13 and select axis accordingly
A1=2*6/2 //m^2
A2=2*7.5 //m^2
A3=3*5/2 //m^2
A4=1*4 //m^2
A=A1+A2+A3+A4 //m^2
//centroid of simple geometries are
x1=2*2/3 //m
y1=6/3 //m
x2=2+1 //m
y2=7.5/2 //m
x3=2+2+3/3 //m
y3=1+5/3 //m
x4=4+4/2 //m
y4=0.5 //m
xbar=(A1*x1+A2*x2+A3*x3+A4*x4)/(A) //m
ybar=(A1*y1+A2*y2+A3*y3+A4*y4)/(A) //m
printf("centroid is at\nxbar=%.3f mm\nybar=%.3f mm",xbar,ybar)
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