Question

how do you find the Lateral Area, Surface Area, and the Volume of a Cylinder..???

Answer 1

Lateral surface area would be like the area of a label on a can of soup. You ignore the area of the top and bottom, and calculate it like you peeled off the label and just had a rectangle.

The volume is the area of the top or bottom times the height. The area of a circle is pi*r squared.

Answer 2

Total surface area is the area of the label plus the area of the top plus the area of the bottom.

Answer 3

im so confused haha xD

Answer 4

If you had a can of soup and peeled off the label, it would be in the shape of a rectangle. The area of a rectangle is length * height.

Answer 5

ok.

Answer 6

So let's say your can of soup is 5 inches tall and has a diameter of 3 inches (or a radius of 1.5 inches). Let's calculate Lateral Surface Area.

Answer 7

Diameter is the width of the can, but circumference is the distance around the can (say you were to tie a string around the can,).

Answer 8

ok i got that paart

Answer 9

Do you know how long that string would be?

Answer 10

hold on let me calculate it.

Answer 11

47.1 right?

Answer 12

Does it make sense to you that you would need a 47 inch long string to go around a can of soup?

Answer 13

yeah :)

Answer 14

No. The relationship we are looking for is Circumference to Diameter. It has a special symbol.

Answer 15

Oops sorry i didnt see the Inches part -__-

Answer 16

That is to say for every circle, the distance around (circumference) divided by the distance across (diameter) is always the same number; we call this number pi.

Answer 17

So if the distance across the can of soup is 3 inches, then the distance around is... ?

Answer 18

3in?

Answer 19

Does it make sense to you that you could make it around a can of soup with a 3 inch piece of string?

Answer 20

i dont know maybe. I told you im dumb at math i dont understand it this is the only subject i dont get a 90 on.. or maybe its because im not paying attention idk what it is -__- Sorry if your getting annoyed

Answer 21

Do you have any cans of anything, (especially something with a label) and some string and a ruler?

Answer 22

Nope nothing like that only a can

Answer 23

How about paper with lines on it?

Answer 24

I have to go, but it would be a good experiment to try to measure the distance across and around a can. Then divide the distance around by the distance across and see what you get.

Answer 25

i dont know maybe. I told you im dumb at math i dont understand it this is the only subject i dont get a 90 on.. or maybe its because im not paying attention idk what it is -__- Sorry if your getting annoyed

Answer 26

sorry i thought i sent tat message before and i sent it now by mistake

Answer 27

No worries. Good luck.

Answer 28

thanks man