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A cylindrical steel is 1.5 meters long. After it is cut into three small columns, the surface area increases by 100.48 square centimeters. What is the volume of the original steel? Use the formula to solve the problem
The cylinder is cut into three sections, adding four bottom areas. After calculating each bottom area, the volume can be calculated
100.48 △ 4 = 25.12 (M2)
25.12 × 1.5 = 37.68 (M3)
After a 1-meter-long cylindrical steel is cut into two sections, the surface area increases by 6.28 square decimeters, and the original volume of the steel is______ Cubic meter
6.28 square decimeter = 0.0628 square meter, (0.0628 △ 2) × 1, = 0.0314 × 1, = 0.0314 (cubic meter); answer: the original volume of this steel is 0.0314 cubic meter, so the answer is: 0.0314
After a 1-meter-long cylindrical steel is cut into three sections, the surface area increases by 100 square centimeters, which is the same as the original volume of steel?
It is cut into three sections with four more faces, each with a cross-sectional area of 100 / 4 = 25 (square centimeter)
The volume of the cylinder is bottom area * height, 1 m * 25 square cm = 2500 cubic cm
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