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A solid is bounded below the sphere x2 + y? + z? 4z and above the cone z = Vx2 + y?, with density

A solid is bounded below the sphere x2 + y? + z? 4z and above the cone z = Vx2 + y?, with density 8(x, y, z) which is the z-coordinate of the centre of gravity of the solid. My 1 and mass m = 47n In 2. Find z,

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