A square aluminum plate (volume mass ρ = 2700 kg/m^3) has dimension L = 4.8 m and e = 0.9 m. A cylinder of radius R = 1.5 m and at a distance d = 1.2 m from the center of the plate and at 20 deg with the horizontal, is removed from the plate. Find the centre of mass of this plate from the lower left corner. Note the centre of mass about for the z-axis is neglected in the answer, since it is obviously at e/2.

- I tried finding the center of masses for the square aluminum plate and the cylinder removed from the plate, and then subtracted the cylinder's center of mass from that of the square plate. Apparently I'm not getting the right answer though so any help would be appreciated.