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//
//The section is divided into a triangle PQR, a semicircle PSQ having base on axis AB and a circle having its centre on axis AB
//variable declaration
//Now,Moment of inertia of the section about axis AB
IAB=(80*(80**3)/12)+(%pi*(80**4)/128)-(%pi*(40**4)/64)
printf("\n IAB= %0.0f mm^4",IAB)
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