The height of the cylinder is 8 cm, the total area is 130 cm2, find its volume

Let's look at the formula first: 1. The area of the circle = pi radius radius.

2. The circumference of the circle = pi diameter = pi radius 23, the side area of the cylinder = the circumference of the bottom circle is high.

4. The surface area of the cylinder = the upper and lower bottom surface area + the side area.

5. The volume of the cylinder = the height of the base area.

Let the radius of the upper and lower bottom surface area be r, then according to the formula of 1, 2 and 3, it can be obtained: bottom surface area = r 2 side area = 2 r 8

Then according to the formula of 4, we can get: 130 = 2 r 2 + 2 r 8 solution r=5, so according to the formula of 5, the volume of the cylinder = 5 2 8 = 200 should be very detailed.

The full area is the area of the surrounding circle.

Still is. Also add the area of the upper and lower round lids.

If you don't add. I've figured it out.

If added. I'll do the math again.

Reply as soon as possible.

Let the radius of the bottom circle be r, and the full area = the sum of the areas of the two bottom circles + the side area. That is, 2 r + 2 r 8 = 130, the solution.

r=5 or r=-13 (round), so the radius of the bottom circle is 5cm, and the volume = the height of the base area, that is, v=s h= r h=25 8=200 (cm).

The basic concept should be clear :)

Base radius: 8 2 = 4 cm.

Volume = base area * height.

Cubic centimetre.

radius in centimeters.

The square centimeter of the surface area, 10, the surface area of the cylinder = 2 * the bottom area + the side area, you should be fine. , 1, the surface area of the cylinder = 2 base areas + side area radius cm).

surface area square centimeters), 1,

1) 40 2 5 = 4 (cm) Bureau digging noisy Tong Shi, 2).

5,, cubic centimeters), A: The volume of this cylinder is cubic centimeters

So the answer is: dissipation.

78500 (spring cubic centimeters).

A: The volume leakage is 78,500 cubic centimeters.

Analysis: The volume of the cylinder and the bottom area are high.

Indicated by letters:

v sh r hap hail limb h

Surface area: 8 divided by 2 = 4 cm.

Multiply 4 by 4 by 2

Multiply by 32 square centimeters.

Multiply 8 by 10 by 80

Cm. Volume: 4 times 4 times 10

Multiply by 160 cubic centimeters.

The surface area is one square centimeter and the other is 471 square centimeters.

Surface area: square centimeters.

Volume: cubic centimeters.

The surface area is 8 times 2 plus 8 times 10

The radius of the bottom surface of the cylinder is 2 2=1 cm, so the volume of the cylinder is cubic centimeters.

Hello chain noisy!

The volume of the cylinder = the trapped area of the bottom shed is high.

So s= r 2

Cubic centimetre. Only represents a personal point of view, don't spray if you don't like it, thank you.