A 24 cm long wire is used to enclose a container in the shape of the largest cube. The volume of the cube is______ Cubic decimeter

A 24 cm long wire is used to enclose a container in the shape of the largest cube. The volume of the cube is______ Cubic decimeter

24 △ 12 = 2 (CM), 2 × 2 × 2, = 4 × 2, = 8 (cm3), = 0.008 (cubic decimeter); answer: the volume of this cube is 0.008 cubic decimeter. So the answer is: 0.008

A wire is surrounded into a square with a side length of 4.71 decimeters. If it is changed to a circle, the area of the circle is______ Square decimeter

Perimeter of square: 4.71 × 4 = 18.84 (decimeter) radius of circle: 18.84 △ 3.14 △ 2 = 3 (decimeter) area of circle: 3.14 × 32 = 28.26 (square decimeter) answer: the area of circle is 28.26 square decimeter. So the answer is: 28.26

On a 4-meter-long cylindrical steel column, a 31.4-meter-long iron wire is used to circle the steel column for 10 times. The volume of the steel column is () cubic decimeter
A. 31.4B. 125.6C. 31400

4 meters = 40 decimeters, 31.4 △ 10 = 3.14 (decimeters), 3.14 × (3.14 △ 3.14 △ 2) 2 × 40, = 3.14 × 0.25 × 40, = 31.4 (cubic decimeters); answer: the volume of this steel column is 31.4 cubic decimeters