Water at a rate of 45,500 kg/hr is heated from 80* C to 150*C in a shell-and-tube heat exchanger haveing two passes and eight tube passes and a total ouside heat transfer surface area of 925 m square Hot exhaust gases having approximately the same thermophysical properties as air enter at 350* C and exit at 175* C. Determine the overall heat transfer coefficient based on the outside surface area.