A uniform thin square sheet 60 cm on a side has a rectangular section 20 cm wide and 40 cm tall removed from its upper-right corner. The original sheet’s lower-left corner is the origin, and its sides lie along the positive x- and y-axes. Determine the coordinates (xCM,yCM) of the center of mass of the remaining L-shaped plate.
a) (27.1cm,24.3cm)
b) (30.0cm,30.0cm)
c) (24.3cm,27.1cm)
d) (27.1cm,32.9cm)