Question

Dropping less than two inches per mile after emerging from the​ mountains, a river drains into the ocean. One​ day's discharge at its​ mouth, 9.6 trillion​ gallons, could supply all of country​ A's households for six months. Based on this​ statement, determine how much water an average household uses each month. Assume that there are 200 million households in country A.

Answer 1

We are given the following data:

total discharge = 9.6 trillion gallons

number of household = 200 million

number of months = 6 months

So the average use of each household per month is:

average use = (9.6 trillion gallons) / (200 million households * 6 months)

average use = 8,000 gallons / household / month

So each household uses 8,000 gallons per month