Chapter 14.6, Problem 40E

Center of Mass In Exercises 37-40, find the mass and the indicated coordinate of the center of mass of the solid region Q of density $\rho$ bounded by the graphs of the equations.

Find $\bar{y}$ using $\rho (x,y,z)=k$

$Q:\frac{x}{a}+\frac{y}{b}+\frac{z}{c}=1(a,b,c>0),x=0,y=0,z=0$