A 1.5-meter-long cylinder is sawed into four identical cylinders, and the surface area increases by 56.52 square decimeters. What is the original volume of the cylinder

After sawing into four sections, six bottom surfaces are added, with the bottom area of 56.52 △ 6 = 9.42 square decimeters and the volume of 9.42 × 1.5 × 10 = 141.3 cubic decimeters

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1. As shown in the figure on the right, a 4-meter-long cylindrical steel is cut into two sections on average. The surface area is increased by 12.56 square centimeters, and the volume of each section of steel is several cubic centimeters Pay attention to the unit
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