[填空题]
A square uniform raft, 18 m by 18 m, of mass 6800 kg, is used as a fe m: ezycrwb r08(jm14arryboa6;(*4prmnz+* k)f f tllslo srt. If three cars, each of mass 1200 kornrl+*m pl ;sf*t ls)4fz(k6g, occupy its NE, SE, and SW corners, determine the CM of the loaded ferryboat.$X_{CM}$ = m $Y_{CM}$ = m