Four identical rods AB, CD. CF and DR are joined as shown in figure. The length, cross-sectional area and thermal conductivity of each rod are l, A and K respectively. The ends A, E and F are maintained at temperatures T1=70∘C, T2=30∘C and T3=40∘C respectively. Assuming no loss of heat to the atmosphere, find the temperature at B.

Four identical rods AB, CD. CF and DR are joined as shown in figure. T

1.	Four identical rods AB, CD. CF and DR are joined as shown in figure. The length, cross-sectional area and thermal conductivity of each rod are l, A and K respectively. The ends A, E and F are maintained at temperatures T1=70∘C, T2=30∘C and T3=40∘C respectively. Assuming no loss of heat to the atmosphere, find the temperature at B.
Answer» Four identical rods $AB, CD. CF$ and $DR$ are joined as shown in figure. The length, cross-sectional area and thermal conductivity of each rod are $l, A$ and $K$ respectively. The ends $A, E$ and $F$ are maintained at temperatures $T_{1} = 70^{\circ} C, T_{2} = 30^{\circ} C$ and $T_{3} = 40^{\circ} C$ respectively. Assuming no loss of heat to the atmosphere, find the temperature at $B$ .

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