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//Variable declaration:
Q = 12000.0 //Heat transfer rate (Btu/h)
U = 48.0 //Overall heat coefficient (Btu/ft^2.h..)
DTlm = 50.0 //Log mean temperature difference (.)
//Calculation:
A = Q/(U*DTlm) //Area of exchanger (ft^2)
//Result:
printf("The area of the exchanger is : %.0f ft^2 .",A)
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