# Units of Conversion: Cubic (Volume) Measure - Problem 1

Basic to the understanding of unit conversion is the understanding of equivalence, the understanding of the multiplicative identity of 1, and how the two are related. For a review of these concepts, click on Review.

You will also need to multiply and reduce fractions. If you have forgotten how to manipulate fractions, visit Fractions for Adults on SOSMath for an in-depth review.

Review the following table of Standard Units of Conversion to see if you can create fractions that have a value of 1. You can click to examples following each table.

Cubic Measure

Problem 1:Convert 25,000 cubic feet to cubic yards.

Solution:

Short Solution:

• From the above table, you can see that there is a link between cubic feet and cubic yard: 27 cubic feet is equivalent to one cubic yard.
• 25,000 cubic feet can be written as

• Multiply the above fraction by 1 in the form

• Multiply the two fractions.

• Cancel the cubic feet in the above fraction and simply.

Long Solution:

• According to the linear conversion table, 1 yard is equivalent to 3 feet.
• Write 25,000 cubic feet as 25,000 x 1 foot x 1 foot x 1 foot.
• Now write the above as 25,000 x 1 foot x 1 x 1 foot x 1 x 1 foot x 1, where the 1 is written in the equivalent form

to obtain

• Rewrite the expression again as

• Multiply the fractions.

• Rewrite as several fractions where some of the fractions have a value of 1.

If you would like to work another problems click on Problems.

[Units of Conversion]