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Earlier discussion
1 older comment kept for context.
Oluwaseun Adeyemi
The rate of heat transfer is given by
Q/t = kAΔT/L
where K = Thermal conductivity
A = Area
ΔT = change in temperature,
L = length of surface,
Q = heat transfer,
t = time
QL = kATt
K = QL/AΔTt = (Jxm)/(m2 × k × s) = J/(5 × k × m) = J/5 × 1/km
But W = J/5
K = W/Km or J/skm