A machinist starts with three identical square plates but cuts one corner from one of them, two corners from the second, and three corners from the third. Rank the three plates according to the x coordinate of their centers of mass, from smallest to largest. @Mannika (this not exact step. just a way of thinking)
or if you consider centre to be origin the shift in centre of mass due to system 1 is same as that of system 3 because from system 1 cut portion is on left and for system 2 two of the cut portion is on left and one on right so equalent will be one from left.
for second system two cut portions are removed from left
Study 40% syllabus and score up to 100% marks in JEE