In a certain double pipe heat exchanger, hot water flows at a rate of 50,000 kg/h and gets cooled from 95 C to 65 C. At the same time 50,000 kg/h of cooling water at 30 C enters the heat exchanger. The flow conditions are such that the overall heat transfer coefficient remains constant at 2270 W/m^2.K. Calculate the heat transfer area required, assuming the two streams are in parallel flow and for both the streams
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