GATE Civil Engineering (CE) 2016 Shift 2 Solved Paper

For a wastewater sample, the three-day biochemical oxygen demand at incubation temperature of 20°C (BOD_{3day, 20°C}) is estimated as 200 mg/L. Taking the value of the first order BOD reaction rate constant as 0.22 day^-1, the five-day BOD (expressed in mg/L) of the wastewater at incubation temperature of 20°C (BOD_{5day, 20°c}) would be _________