The plates in a plate and frame heat exchanger are made of Monel 200 (k = 38.1 Btu/hr-ft-°F) and are 0.04-in thick. Consider one of the plates in this heat exchanger. The convective heat transfer coefficients on hot and cold side of the plate are 180 Btu/hr-ft2-°F and 200 Btu/hr-ft2-°F, respectively. The average heat flux through the plate is 1,200 Btu/h-ft2. Determine the average temperature difference between the hot and cold fluids.