heat exchanger

Q: A water cooler uses 50kg/hr of melting ice to cool running water from 28°C to 8°C. Based on the outside coil area, Uo = 630 W/m²-K. If Cp of water is 4.186 kj/kg-K and heat of fusion of ice is 334 kj/kg, find a) LMTD b)Area of outside coil. Tanong ko lang po if yung sa LMTD, constant na 0°C...