Surface area of a Tube

[K‡rbyroth]

If a cardboard tube is cut vertically, it is a rectangle. What is the surface area of a cardboard tube that is 4 inches long with a circumference of 5 inches?

 

[Loren]

When you do the cutting and get the rectangle, the height of the rectangle used to be the what of the tube? The length of the rectangle used to be the what of the tube? Once you have decided that, use the formula for the area of a rectangle to answer your question.

 

[Deleted member 4993]

If a cardboard tube is cut vertically, it is a rectangle. What is the surface area of a cardboard tube that is 4 inches long with a circumference of 5 inches?

You know the drill....

Please share your work with us, indicating exactly where you are stuck - so that we know where to begin to help you

 

[K‡rbyroth]

the length would be the circumference which is 4 and height should be 5

if u use area of rectangle that would be 20 i tried that and it was wrong

ok nm it counted right this time