Two fluids A and B exchange heat in counterflow heat exchanger. Fluid A enters at 700 K and fluid B enters at 300 K. Mass flow rate of A & B is 1 kg/s. Specific heat of fluid A and B is 1000 J/kg K and 4000 J/kg K. Net effectiveness of heat exchange is 75%. Exit temperature of Fluid B is

Two fluids A and B exchange heat in counterflow heat exchanger. Fluid

1.	Two fluids A and B exchange heat in counterflow heat exchanger. Fluid A enters at 700 K and fluid B enters at 300 K. Mass flow rate of A & B is 1 kg/s. Specific heat of fluid A and B is 1000 J/kg K and 4000 J/kg K. Net effectiveness of heat exchange is 75%. Exit temperature of Fluid B is
A.	380 K
B.	385 K
C.	375 K
D.	370 K
Answer» D. 370 K