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Wedges B and C are smooth and they are p...

Wedges `B` and `C` are smooth and they are placed in contact as shown. Block `A` is placed on wedge `B` at a height `h` above ground. Block and the two wedges are all of same mass `m`. Neglect friction every where.

The maximum height upto which block `A` rises on wedge `C` is

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