The upper surface of a plate having $0\mathrm{.}95$ emissivity and temperature $307\mathrm{.}2$ K is exposed with an area of $1\mathrm{.}8m^2$ to an ambient air temperature of $297K,h$ is $2\frac{W}{m^{\text{'}}}2K$ and the bottom plate is at $308$ K $.$ What is the heat loss to the ambient if the thickness of the plate is $3$ mm and conductivity of the plate is $0\mathrm{.}3\frac{W}{m}K?$

Select one:

a$.146$ W

b$.126$ W

c$.142$ W

d$.152$ W

The correct answer is: $146$ W