Assignment:
Dropping less than 2 inches per mile after emerging from the mountains a river drains into the ocean. One day's discharge at its mouth, 5.6 trillion gallons, could apply to all of country X's households for four months.
Based on this how much water does the avg. household use each month? Assume 200 million households in country X.
Provide complete and step by step solution for the question and show calculations and use formulas.