# Water is flowing out of an artesian spring at a rate of 8 cubic feet per minute. There are 7.5 gallons of water per cubic foot. How many minutes will it take for the water to fill up a 300 gallon tank?

##### 2 Answers

It will take

#### Explanation:

As the water is flowing out of the artesian spring at a rate of

the water is flowing out of the artesian spring at a rate of

As the tank can fill up

it should take

The time taken for 300 gallons is 5 minutes

#### Explanation:

you can manipulate units of measurement the same way you do the numbers.

Let cubic feet per minute be

Let gallons of water per cubic foot be

So

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Using ratio in fraction form

Turn the whole thing upside down

By example, using the same principle as

Multiply by 1 and you do not change the overall value. However, 1 comes in many forms.

The time taken for 300 gallons is 5 minutes