Two Carnot engines A and B are operated ...

Two Carnot engines A and B are operated in series. A receives heat at 900 K and rejects it to the reservoir at TK. B receives the rejected heat from Aand rejectsit to itsreservoir at 400 K. If the work outputs of A and B are equal, then T is

750 K

700 K

650 K

600 K

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