The ultimate $\mathrm{BOD}\left(L_{0}\right)$ of a wastewater sample is estimated as $87 \%$ of $\mathrm{COD} .$ The $\mathrm{COD}$ of this wastewater is $300 \mathrm{mg} / \mathrm{L}$. Considering first order $\mathrm{BOD}$ reaction rate constant $\mathrm{k}$ (use natural $\log )=0.23$ per day and temperature coefficient $\theta=1.047$, the $\mathrm{BOD}$ value (in $\mathrm{mg} / \mathrm{L}$, up to one decimal place) after three days of incubation at $27^{\circ} \mathrm{C}$ for this wastewater will be

The ultimate $\mathrm{BOD}\left(L_{0}\right)$ of a wastewater sample is estimated as $87 \%$ of $\mathrm{COD} .$ The $\mathrm{COD}$ of this wastewater is $300 \mathrm{mg} / \mathrm{L}$. Considering first order $\mathrm{BOD}$ reaction rate constant $\mathrm{k}$ (use natural $\log )=0.23$ per day and temperature coefficient $\theta=1.047$, the $\mathrm{BOD}$ value (in $\mathrm{mg} / \mathrm{L}$, up to one decimal place) after three days of incubation at $27^{\circ} \mathrm{C}$ for this wastewater will be

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