a$950\backslash$deg C by introducing

$1\mathrm{.}1\%$C at its steel surface. What will be the final carbon content $0\mathrm{.}0012$ m beneath the

surface if this treatment was lasted for $20$ hours. The initial carbon content of steel is

$0\mathrm{.}15\%8\mathrm{.}31($j$)/($m$)$ol$.$K $810\backslash$deg C$,$ how long will it take to achieve same

carburized layer for this steel?