Four bodies of masses 1,2,3,4 kg respectively are placed at the comers of a square of side ‘a’. Coordinates of centre of mass are (take 1kg at the origion, 2kg on X-axis and 4kg on Y-axis)

• A

  $\left(\frac{7\mathrm{a}}{10},\frac{\mathrm{a}}{2}\right)$

• B

  $\left(\frac{\mathrm{a}}{2},\frac{7\mathrm{a}}{10}\right)$

• C

  $\left(\frac{\mathrm{a}}{2},\frac{3\mathrm{a}}{10}\right)$

• D

  $\left(\frac{7\mathrm{a}}{10},\frac{3\mathrm{a}}{2}\right)$