Question: In a heating system, cold outdoor air at 10C flowing at a rate of 6 kg/min is mixed adiabatically with heated air at 70C flowing

In a heating system, cold outdoor air at 10°C flowing at a rate of 6 kg/min is mixed adiabatically with heated air at 70°C flowing at a rate of 3 kg/min. The exit temperature of the mixture is
(a) 30°C (d) 55°C
(b) 40°C (e) 85°C
(c) 45°C

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