document.write( "Question 1181724: 17. Find the volume of the largest right circular cylinder of altitude 8 in. that can be cut from a sphere of diameter 12 in. \n" ); document.write( "
Algebra.Com's Answer #849976 by CPhill(1959)![]() ![]() You can put this solution on YOUR website! Here's how to find the volume of the largest cylinder:\r \n" ); document.write( "\n" ); document.write( "**1. Visualize the Setup:** Imagine a sphere with a cylinder inside it. The cylinder's height is fixed at 8 inches, and we want to find the largest possible radius for the cylinder.\r \n" ); document.write( "\n" ); document.write( "**2. Key Dimensions:**\r \n" ); document.write( "\n" ); document.write( "* Sphere diameter = 12 inches, so sphere radius (R) = 6 inches. \n" ); document.write( "* Cylinder height (h) = 8 inches. \n" ); document.write( "* Let 'r' be the radius of the cylinder.\r \n" ); document.write( "\n" ); document.write( "**3. Cross-Section:** A cross-section through the center of the sphere and cylinder reveals a circle (the sphere) with a rectangle (the cylinder) inside. The diagonal of this rectangle is the diameter of the sphere (12 inches).\r \n" ); document.write( "\n" ); document.write( "**4. Pythagorean Theorem:** We can use the Pythagorean theorem to relate the sphere's radius (R), the cylinder's radius (r), and *half* of the cylinder's height (h/2):\r \n" ); document.write( "\n" ); document.write( "R² = r² + (h/2)²\r \n" ); document.write( "\n" ); document.write( "**5. Solve for the Cylinder's Radius (r):**\r \n" ); document.write( "\n" ); document.write( "6² = r² + (8/2)² \n" ); document.write( "36 = r² + 16 \n" ); document.write( "r² = 20 \n" ); document.write( "r = √20 = 2√5 inches\r \n" ); document.write( "\n" ); document.write( "**6. Volume of the Cylinder:**\r \n" ); document.write( "\n" ); document.write( "Volume of a cylinder = πr²h \n" ); document.write( "V = π(2√5)² * 8 \n" ); document.write( "V = π * 20 * 8 \n" ); document.write( "V = 160π cubic inches\r \n" ); document.write( "\n" ); document.write( "**Therefore, the volume of the largest right circular cylinder is 160π cubic inches, or approximately 502.65 cubic inches.** \n" ); document.write( " \n" ); document.write( " |