ISRO Scientist or Engineer Mechanical 2020 Question 20

Question 20

The external surface of a wall of height 3m height ,5 m width and 0.5 m thickness is at a temperature of $$2^\circ$$ C.If a heat loss of 150 wfrom the room is measured across the wall ,find the inner wall temperature ?The thermal conductivity of wall material can be taken as 1 $$\frac{W}{m.k}$$



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