The area is 591. To calculate it, use the formula for the area of the frustum of a cone:
A = π × (R² + r² + S × (R + r))
A = π × (8² + 2² + 12 × 10) = 591
You can also calculate the area of the frustum of a cone if you know other quantities: the height or the slant height of either the larger cone or the smaller one. Read more