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A 40.7-cm-by-40.7-cm checkerboard has a mass of 157.1 g. There are four 21.5-g checkers located on the checkerboard, as shown in the figure. Relative to
the origin located at the bottom left corner of the checkerboard, where is the center of mass of the checkerboard-checkers system?
Xcm=33.9 cm
; Ycm = 26.2 cm
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