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A straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder. What is the density of a 240-g rock that displaces $89.0\textrm{ cm}^3$ of water? (Note that the accuracy and practical applications of this technique are more limited than a variety of others that are based on Archimedes’ principle.)
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$2.70 \textrm{ g/cm}^3$
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OpenStax College Physics for AP® Courses Solution, Chapter 11, Problem 4 (Problems & Exercises) (0:22)

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This is College Physics Answers with Shaun Dychko. An object has a mass of 240 grams and a volume of 89.0 centimeters cubed and we have to find its density. So we divide the mass by the volume to find density so that's 240 grams divided by 89.0 cubic centimeters which is 2.70 grams per cubic centimeter.