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Three rods of lengths 20cm eac h and are...

Three rods of lengths 20cm eac h and area of cross section `1cm^(2)` are joined to from a triangle ABC. The conductivites of the rods are `k_(AB)=50Js^(-1)m^(-1)`(@)C^(-1)` , `k_(BC)=200Js^(-1)m^(-1)`(@)C^(-1)` , and `k_(AC)=400Js^(-1)m^(-1)`(@)C^(-1)` . The junction A,B and C are maintained at `40^(@)C` , `80^(@)C` and `80^(@)C` respectivelt. Find the rate of heat flowing through the rods AB, AC and BC .

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