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A particle A of mass 1kg moves along the...

A particle A of mass 1kg moves along the line 3x-4y=0 with a speed of 10m`s^(-1)` and another particle B of mass 2kg moves along the line 12y+5x=0 with a speed of v m`s^(-1)` .Both of them start simultaneously from the origin,with A and B moving in first and fourth quadrants respectively,such that their centre of mass is always on x -axis. The value of v is ?

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