Consider steady-state heat conduction across the thickness in a plane composite wall (as shown in the figure) exposed to convection conditions on both sides.Givenhi = 20 W / m2K; h0 = 50 W / m2K; T∞,i = 20°C; T∞,0 = - 2°C ; k1 = 20 W / mk; k2 = 50 W / mk; L1 = 0.30 m and L2 = 0.15 mAssuming negligible contact resistance between the wall surfaces, the interface temperature, T (in °C), of the two walls will be

Consider steady-state heat conduction across the thickness in a plane

1.	Consider steady-state heat conduction across the thickness in a plane composite wall (as shown in the figure) exposed to convection conditions on both sides.Givenhi = 20 W / m2K; h0 = 50 W / m2K; T∞,i = 20°C; T∞,0 = - 2°C ; k1 = 20 W / mk; k2 = 50 W / mk; L1 = 0.30 m and L2 = 0.15 mAssuming negligible contact resistance between the wall surfaces, the interface temperature, T (in °C), of the two walls will be
A.	-0.50
B.	2.75
C.	3.76
D.	4.50
Answer» D. 4.50

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