The side view of a cylinder is a square. If the height of the cylinder is shortened by 2 cm, the surface area will be reduced by 12.56 square cm Is to find the original cylinder surface area! There must be formula~ I only know that the answer is 45.7184 square centimeters~ Hehe, the answers are shown in the following reference answers

The side view of a cylinder is a square. If the height of the cylinder is shortened by 2 cm, the surface area will be reduced by 12.56 square cm Is to find the original cylinder surface area! There must be formula~ I only know that the answer is 45.7184 square centimeters~ Hehe, the answers are shown in the following reference answers

It's very simple, because a cylinder originally has two base heights, after shortening by two centimeters, we can only regard it as reducing the area of only one side, and a cylinder with a square side view represents that the diameter of the base is equal to the height. Then we can know the height by knowing the diameter of the base. How can we find the diameter of the base according to the formula
12.56 ﹣ 2 ﹣ 3.14 = 2 (bottom diameter) and then 2 ﹣ 2 = 1 (bottom radius) 3.14 × 1 × 1 (square of 1) × 2 = 6.28 (original cylinder surface area)
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