The heat transfer by conduction through a thick cylinder (Q) is given by (where T₁ = Higher temperature, T₂ = Lower temperature, r₁ = Inside radius, r₂ = Outside radius, l = Length of cylinder, and k = Thermal conductivity) Options: A . &nbspQ = = 2πlk/2.3 (T₁ - T₂) log (r₂/r₁) B . &nbspQ = [2π (T₁ - T₂)]/2.3 lk log (r₂/r₁) C . &nbspQ = [2πlk (T₁ - T₂)]/2.3 log (r₂/r₁) D . &nbspQ = 2.3 log (r₂/r₁)/[2πlk (T₁ - T₂)]

The heat transfer by conduction through a thick cylinder (Q) is given by (where

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