The perimeter of a cylinder is 12.56 decimeters, the height is reduced by 2 decimeters, and the rear area is 125.6 square decimeters?

The perimeter of a cylinder is 12.56 decimeters, the height is reduced by 2 decimeters, and the rear area is 125.6 square decimeters?

Now the height is 125.6 △ 12.56 = 10 (decimeter), the original height is 10 + 2 = 12 (decimeter), the bottom radius is 12.56 △ 3.14 △ 2 = 2 (decimeter), the bottom area is 2 × 2 × 3.14 = 12.56 (square decimeter), the side area is 12.56 × 12 = 150.72 (square decimeter) and the surface area is 12.56 × 2 + 150.72 = 175.84 (square decimeter)

Elden Ring Premiere

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