Water (c p = 4180 J/kg K) enters a 12-cm-diameter and 8.5-m-long tube at 75C at

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Water (cp = 4180 J/kg · K) enters a 12-cm-diameter and 8.5-m-long tube at 75°C at a rate of 0.35 kg/s, and is cooled by a refrigerant evaporating outside at 210°C. If the average heat transfer coefficient on the inner surface is 500 W/m· K, the exit temperature of water is
(a) 18.48C

(b) 25.08C

(c) 33.88C

(d) 46.58C

(e) 60.28C

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