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A steel plate of thickness 5 cmm and thermal conductivity 20 W/mK is subjected to a uniform heat flux of 800 W/m2 on one surface A and transfers heat by convection with a heat transfer coefficient of 80 W/M2k from the other surface B into the ambinet air at T¥ of 250C. the temperature of the surface B transferring heat by convection is (IES-99)

(a) 250C                      (b) 350C

(c)450C                        (d) 550c

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