A conducting cylinder has curved surface covered with insulated layer. Flat surfaces are perfect absorbers. Flat surface area is  $\frac{3}{17}{m}^2$. A point light source placed at some distance from left face. Temperature of surrounding is 0 K. In steady state temperature of left face is 200 K and right face 100 K. Then (Stefan’s constant = $\frac{17}{3}\times {10}^{-8}W/m^2{k}^4$)