The height of a cylinder is equal to the circumference of its bottom surface. The side of the cylinder expands along the height and is a () shape. If the height is 31.4cm, then the cylinder is a () shape The product is () and the volume is ()

The height of a cylinder is equal to the circumference of its bottom surface. The side of the cylinder expands along the height and is a () shape. If the height is 31.4cm, then the cylinder is a () shape The product is () and the volume is ()

It's a (square)
The second question is what product?
Radius: 31.4 / (3.14 * 2) = 5 (CM)
3.14 * 5 * 5 * 31.4 = 169.56 (cm3)
A: the volume is 169.56 cubic centimeters

The side area of a cylinder is 100 square centimeter, the bottom radius is 3 centimeter, how many cubic meters is its volume

Except for V = π R & # 178; H
And V = 1 / 2CH × R
That's half of the side area X the radius
Volume = 100 × 1 / 2 × 3 = 150 CC
If you understand and solve your problem,

The side area of a cylinder is 100 square centimeters, and its bottom radius is 3 centimeters. What is its volume?
The words in the exercise book are not bad

Circumference of cylinder bottom: 2 π r = 6 π
Column height: 100 △ 6 π
Cylinder volume: bottom area multiplied by height, π R & sup2; multiplied by (100 △ 6 π) = 150m & sup3;