A liquid food product is being cooled from 80C to 30C in an indirect heat exchanger using cold water as a cooling medium. If the product mass fl ow rate is 1800 kg/h, determine the water fl ow rate required to accomplish product cooling if the water is allowed to increase from 10C to 20C in the heat exchanger. The specifi c heat of the product is 3.8 kJ/(kg K) and the value for water is 4.1 kJ/(kg K).