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Two Camot engines A and B are operated i...

Two Camot engines A and B are operated in series. The first one, A , receives heat at `T_(1)(=600 K)` and rejects to a reservoir at temperature `T_(2)`. The second engine B receives heat rejected by the first engine and, in turn, rejects to a heat reservoir at `T_(3)(=400K).` Calculate the temperature `T_(2)` if the work outputs of the two engines are equal :

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