kill(all)$

fpprintprec:4$

van=facebook.com/LearningCalculus$

f(x):=2*b^2-250 = 0$

B:rhs(second(solve(f(b),b)))$ B;

float(%);

Area(b):=abs(((-25+b^2)^((-1)/2)*(-50+b^2*3)*(-50+b^2)^2*b^(-4)*5)/4);

Area(B);