If V1 = 3V and V2 = 1.5V where V is the volume of digestion tank, V1 is the raw sludge added per day and V2 is the equivalent digested sludge per day on completion of sludge. Find the average volume of digestion sludge when the change during digestion is assumed to be parabolic rather than linear?
1
V
2
1.5V
3
2V
4
3V