c
\(OA\,\) સળિયાનું \({\text{CM}}\,\,\left( {\frac{{\text{a}}}{{\text{2}}}{\text{,}}\,\,{\text{0}}} \right)\) બિંદુએ \({\text{OB}}\) સળિયાનું \({\text{CM}}\,\left( {\frac{{\text{a}}}{{\text{2}}}{\text{,}}\,\,\frac{{\text{a}}}{{\text{2}}}} \right)\) બિંદુએ 

તંત્ર માટે \({{\text{X}}_{{\text{ cm}}}}\, = \,\,\frac{{m\,\, \times \,\,\frac{a}{2}\,\, + \,\,m\,\, \times \,\,0\,\, + \,\,m\,\, \times \,\,\frac{a}{2}}}{{m\,\, + \,\,m\,\, + \,\,m}}\,\,\, = \,\,\frac{a}{3}\,\,\,\,\)

\( \Rightarrow \,\,\,{Y_{cm}}\, = \,\,\frac{{m\,\, \times \,\,0\,\, + \,\,m\,\, \times \,\,\frac{a}{2}\,\, + \,\,m\,\, \times \,\,\frac{a}{2}\,\,}}{{m\,\, + \,\,m\,\, + \,\,m}}\,\,\, = \,\,\,\frac{a}{3}\)