The volume is 452.5 cm³. To find the volume of a hollow cylinder with diameters D = 8 cm and d=4 cm, and height h = 12 cm, follow these steps:
Calculate the radii: R = D/2 = 4 cm, and r = d/2 = 2 cm;
Calculate the volume of a "crown" with such measurements: π × (R² - r²) = π × (4² -2²) = 37.7 cm²;
Multiply this quantity by the height of the cylinders to find the volume: VH = 37.7 × 12 = 452.4 cm³
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