GED Math Practice Test

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Prepare for the GED Math Test with confidence! Engage in a quiz that includes multiple-choice questions covering key math concepts. Strengthen your mathematical skills and increase your chances of passing the GED with our comprehensive resources.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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In the formula for volume (v=(pi X r squared)h), what does the "r" represent?

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Radius
Rectangle
Result

The correct answer is: Radius

In the formula for volume of a cylinder, represented by $ v = \pi r^2 h $, the "r" specifically stands for the radius of the base of the cylinder. The radius is the distance from the center of the circular base to the edge. In this context, you are calculating the area of the circular base first by squaring the radius (hence $ r^2 $) and then multiplying by $ \pi $, which is a mathematical constant that represents the ratio of a circle's circumference to its diameter. The area of the base is then multiplied by the height (h) of the cylinder to find the total volume. This understanding is crucial because the volume depends directly on the size of the radius; a larger radius would significantly increase the volume of the cylinder. In contrast, the other options do not apply to this formula, as they pertain to different concepts that are not relevant to calculating the volume of a cylinder.