A piece of paper (shown in figure-1) is ...

A piece of paper (shown in figure-1) is in form of a square. Two corners of this square are folded to make it appear like figure-2. Both corners are put together at centre of square 'O'. If O is taken to be (0,0), the centre of mass of new system will be at

A

`((-a)/(8),0)`

B

`((-a)/(6),0)`

C

`((a)/(12),0)`

D

`((-a)/(12),0)`

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