# ASVAB AFQT For Dummies by Rod Powers Author:Rod Powers
Language: eng
Format: epub
ISBN: 9781118813997
Publisher: Wiley
Published: 2014-05-22T18:20:52+00:00

You now have two equations, with two variables that you can use to solve the problem:

Replace s in the second equation with the definition of s in the first equation:

Mary is 20 years old. That’s the same answer you get when you use the one-variable solution in the preceding section.

Geometric problems

These problems require you to compute the volume, perimeter, area, circumference, diameter, and so on of various geometric shapes.

You’re painting a fence that is 20 feet long and 6 feet high. How much square footage of fence are you covering with paint?

The area formula for a rectangle is a = lw, so the answer to this simple problem is a = 6 · 20 = 120 square feet.

Generally, the Arithmetic Reasoning test makers don’t let you off so easy, though. The problem is more likely to be written something like the following.

You’re painting a fence that is 20 feet long and 6 feet high. Paint costs \$7.23 per gallon, and 1 gallon of paint covers 60 square feet of fence. How much do you need to spend on paint to complete the project?

The problem now requires a couple of extra steps to answer. First, you have to compute the area of the fence. You already did that: 120 square feet.

Now you have to determine how many gallons of paint you need to buy to cover 120 square feet. Because 1 gallon of paint covers 60 square feet, you need 120 ÷ 60 = 2 gallons of paint.

Finally, you need to figure how much 2 gallons of paint cost. Paint is \$7.23 per gallon, and you need 2 gallons, so \$7.23 · 2 = \$14.46.

You get quite a few geometric problems on the Arithmetic Reasoning subtest. To make sure you’re ready for them, memorize the basic geometric formulas in Table 10-1. You can find more information about using these formulas in Chapter 8.

Table 10-1 Basic Geometric Formulas

Shape

Function

Formula

Loading...
Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.
Categories
 Studying & Workbooks College & High School Graduate School Professional TOEFL & TOEIC Citizenship Test Flash Cards Study Guides Study & Test-Taking Skills 