A shell-and-tube exchanger having one shell pass and eight tube passes is to heat kerosene from 80°F to 130°F. The kerosene enters at a rate of 2500 lb_m/h. Water entering at 200°F and at a rate of 900 lb_m/h is to flow on the shell side. The overall heat-transfer coefficient if 260 Btu/h ft² °F. Determine the required heat-transfer area.