Lateral area formula of cylinder: lateral area = ground circumference × height s lateral area = bottom c × h.

The surface area formula of cylinder: surface area =2πr×2+ ground circumference× high S surface area =2πr×2+C bottom× h.

Then the surface area of your cake is π *162 *12+π *122 * 6 = 3936 π.

Stands for square * stands for multiplication

I didn't count two cakes stacked together, but I thought they were separate. Which cake on the top has an upper layer and a lower layer, and which cake on the bottom has only an upper layer and no lower layer.