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Four cubes of side a=1 m and of mass 40 ...

Four cubes of side `a=1 m` and of mass `40 g`, `20g, 10 g` and `20g` are arranged in `x-y` plane as shown in the figure. The co-ordinates of the centre of mass of the combination with respect to `O` are `x_cm` and `y_cm`. Find `|x_(cm)+y_(cm)|`.
'(##CEN_KSR_PHY_JEE_C08_E01_001_Q01##)'

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