The surface area of a cylinder is 12.56 square centimeters more than its side area. The height of a cylinder is 5 centimeters. What is its volume? I'm sorry. I can do it. I've got a brain connection

12.56÷2＝6.28 6.28×5＝31.4

When a 2-meter-long cylinder is cut off, its surface area will be reduced by 12.56 square decimeters. What is the original surface area of this cylinder?

2 m = 20 decimeters
Bottom perimeter = 12.56 △ 2 = 6.28 (decimeter)
Bottom radius = 6.28 △ 3.14 △ 2 = 1 (decimeter)
Bottom area = 3.14 × 1 & # 178; = 3.14 (square decimeter)
Side area = 6.28 × 20 = 125.6 (square decimeter)
Surface area = 125.6 + 3.14 × 2 = 131.88 (square decimeter)

Find the surface area of each cylinder below. 1. The side view is a square with side length of 6.28 decimeters

6.28 * 6.28 + 3.14 * 2 in the side is equal to the square of 6.28 * 6.28 upper and lower 2 * 3.14 * r, R is equal to the perimeter divided by 2 * 3.14

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