The side of a cylinder is a square. The perimeter of the square is 6.28 decimeters. What is the volume of the cylinder? Help me

The side of a cylinder is a square. The perimeter of the square is 6.28 decimeters. What is the volume of the cylinder? Help me

The side of a cylinder is a square. The perimeter of the square is 6.28 decimeters. What is the volume of the cylinder?
Bottom circumference = height = 6.28 / 4 = 1.57 decimeters
Radius: 1.57 / (2 * 3.14) = 0.25 decimeter
Volume: 3.14 * 0.25 * 0.25 * 1.57 = 0.3081125 cubic decimeter

There is a cylinder stake, cut along the diameter, the section is a square, the circumference of the bottom of the cylinder is 6.28 cm

6.28 △ 3.14 = 2 (decimeter), 3.14 × (2 △ 2) 2 × 2 = 3.14 × 1 × 2 = 6.28 (cubic centimeter), a: the volume of the cylinder is 6.28 cubic centimeter

The circumference of the bottom surface of a cylinder is 6.28 decimeters, and the height is 1 decimeter. What is the volume?

3.14 × (6.28 ﹣ 3.14 ﹣ 2) 2 × 1 = 3.14 × 1 = 3.14 (cubic decimeter) a: the volume is 3.14 cubic decimeter