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A particle P is projected from a point o...

A particle P is projected from a point on the surface of a smooth inclined pane (see figure). Simultaneously another particle Q is released on the smooth inclined plane from the same postion. P and Q colide on the inclined plane after `t=4` seconds. Find the speed projection in m/s.

A

5 m/s

B

10 m/s

C

15 m/s

D

20 m/s

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