AP EAMCET Medical 2017 Shift 2 Paper

Two carnot's engines ‘A' and 'B‘ are operated in succession. The first engine ‘A’ receives heat at T1 =800 K and rejects heat at T2 K. The second engine receives heat at T2 K and rejects heat at T3 = 300 K. If the work outputs of the engines are equal, the value of T2 is