Answer:
220355.7048 liters/day
Step-by-step explanation:
We know that average daily indoor per capita water use is 69.3 gallons in USA
1 Gallon = 3.7854 liters
So additional average daily water production =280×3×69.3 gallon
=280×3×69.3×3.78541178 liters
= 220355.7048 liters/day