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+//Variable declaration:
+hw = 200.0                      //Water heat coefficient (Btu/h.ft^2.°F)
+ho = 50.0                       //Oil heat coefficient (Btu/h.ft^2.°F)
+hf = 1000.0                     //Fouling heat coefficient (Btu/h.ft^2.°F)
+DTlm = 90.0                     //Log mean temperature difference (°F)
+A = 15.0                        //Area of wall (ft^2)
+
+//Calculation:
+X = 1.0/hw+1.0/ho+1.0/hf        //Equation 14.34 for constant A
+U = 1.0/X                       //Overall heat coeffocient (Btu/h.ft^2.°F)
+Q = U*A*DTlm                    //Heat transfer rate (Btu/h)
+Q = round(Q*10**-1)/10**-1
+
+//Result:
+printf("The heat transfer rate is : %f Btu/h.",Q)