GATE MT 2024 MT Q55: Diffusion in solids

During carburization of a steel at 950 °C, carbon concentration is measured as 0.8 wt.% at a depth of 0.3

after one hour. The time required to get the same carbon concentration at a depth of 0.6

at the same carburization temperature is _____

. (Round off to the nearest integer).

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