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, 5.6 trillion​ gallons, could supply all of country​ A's households for seven months.

Based on this​ statement, determine how much water an average household uses each month.
Assume that there are 100 million households in country A. Country A uses approximately nothing gallons per household per month.

Answer 1

`8000 ((gallons)/(household))/(month)`

Explanation:

We know the river discharge 5.6 trillions of gallons

So:

5.6 trillions of gallons =
`5.6\ x\ 10^(12)` gallons

Then we know that with this amount all households in the country are supplied for 7 months. Also, there are 100 million homes in the country.

So, the average amount of water that a household consumes during 7 months is:

`(5.6\ x\ 10^(12)\ gallons)/(1\ x\ 10^8\ homes)`

= 56 000 gallons/household

Now, the amount that each household consumes per month is:

`(56\ 000\ gallons/household)/(7\ months)`

=
`8\ 000\ (gallons/household)/(month)`