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Four particles P,Q,R,S of masses 1kg, 2k...

Four particles P,Q,R,S of masses 1kg, 2kg, 3kg and 4kg are placed at the corners of a square of side 1m as shown below. The co-ordinates of the centre of mass of the system are

A

`0.5m`, `0.7m`

B

`0.6m`, `0.7m`

C

`0.9m`, `0.8m`

D

`0.4m`, `0.5m`

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A
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