Question

In 1993, hydroelectric power production hit an all time high of 381 billion kilowatt-hours. This is 1 billion kilowatt-hours more than 4 times the 1950 production level. Find the amount of hydroelectric power produced in 1950.

Answer 1

The amount of hydroelectric power produced in 1950 is 95 billion kilowatt-hours.

Explanation:

Given:

In 1993, hydroelectric power production hit an all time high of 381 billion kilowatt-hours.

This is 1 billion kilowatt-hours more than 4 times the 1950 production level.

Now, to find the amount of hydroelectric power produced in 1950.

Let the 1950 production level be
`x`.

So, by putting equation we solve it.

According to question:

`381\ billion=4x+1\ billion`

Subtracting both sides by 1 billion we get:

⇒
`380\ billion = 4x`

Dividing both sides by 4 we get:

⇒
`95\ billion =x.`

Therefore, the amount of hydroelectric power produced in 1950 is 95 billion kilowatt-hours.