GATE Civil Engineering (CE) 2022 Shift 1 Solved Paper

A 2% sewage sample (in distilled water) was incubated for 3 days at 27 °C temperature. After incubation, a dissolved oxygen depletion of 10 mg/L was recorded. The biochemical oxygen demand (BOD) rate constant at 27 °C was found to be 0.23 day^-1 (at base e).
The ultimate BOD (in mg/L) of the sewage will be_________. (round off to the nearest integer)