Basic Math & Pre-Algebra Workbook For Dummies with Online Practice
Book image
Explore Book Buy On Amazon
To find the volume of a prism or cylinder, you can use the following formula, where Ab is the area of the base and h is the height:
V = Ab x h

Practice questions

  1. Find the volume of a prism with a base that has an area of 6 square centimeters and a height of 3 centimeters.
  2. Figure out the approximate volume of a cylinder whose base has a radius of 7 millimeters and whose height is 16 millimeters.

Answers and explanations

  1. 18 cubic centimeters
    V = Ab x h = 6cm2 x 3cm = 18cm3
  2. Approximately 2,461.76 cubic millimeters

    First, use the area formula for a circle to find the area of the base:

    Ab = π x r2
          ≅ 3.14 x (7mm)2
          = 3.14 x 49mm2
          = 153.86mm2

    Plug this result into the formula for the volume of a cylinder:

    V = Ab x h
        = 153.86mm2 x 16mm
        = 2,461.76mm3

About This Article

This article is from the book:

About the book author:

Mark Zegarelli is a math and test prep teacher who has written a wide variety of basic math and pre-algebra books in the For Dummies series.

This article can be found in the category: