$9-89.$

The composite plate is made from both steel $(A)$ and brass $($B$)$ segments. Determine the mass and location $(\stackrel{}{x}\frac{,}{b}ar(y)\frac{,}{b}ar(z)$ of its mass center $G.$ Take ${}_{nt}=7\mathrm{.}85M\frac{g}{m^3}$ and $P_{ln}=8\mathrm{.}74M\frac{g}{m^3}.$

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