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In steady state, rate of heat flow throu...

In steady state, rate of heat flow through rod of variable thermal conductivity shown in the figure is Q = 6000 W. Area of cross section of rod in `m^(2)` varies with x according as `A(x)=(1-x)`, while temperature in Kelvin of rod is `T(x)=300(1-4x-x^(3))`. Find thermal conductivity (in watt/m-K) of rod at x = 0. (Thermal conductivity depends only on x).

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