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// Problem 1.8,Page no.12
clc;clear;
close;
alpha=%pi/2 //degree //In case of semicircle
//Semicircle-1
r_1=20 //cm //radius of semicircle
y_1=4*r_1*(3*%pi)**-1 //cm //distance from the base
a_1=(%pi*r_1**2)*2**-1 //cm**2 //area of semicircle
//Semicircle-2
r_2=16 //cm //radius of semicircle
y_2=4*r_2*(3*%pi)**-1 //cm //distance from the base
a_2=(%pi*r_2**2)*2**-1 //cm**2 //area of semicircle
//Calculations
Y_bar=(a_1*y_1-a_2*y_2)*(a_1-a_2)**-1 //cm //centroid
//Result
printf("The centroid of the area is %.2f cm",Y_bar)
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