Tuesday

September 23, 2014

September 23, 2014

Posted by **Nancy** on Tuesday, November 9, 2010 at 7:46pm.

You need to make a soda can with a volume of 29 cubic inches.

Find the surface area. calculate the following:

a) How much material is needed if the can's radius is 1 inch?

I figured it this way:

Let the height be h

volume = π r²•h

29 = π (1²) • h

h = 29/π

So πr² • 2 + 2π • 29/π

2π + 58 = 64.28 in²

but person who helps me gets it this way:

Let the height be h

volume = π r²h

π (1²)h = 29

h = π /29

the surface area are

= 2 π r²+ 2 π rh

= 2 π (1) + 2 π (1)( π /29)

= 6.96 in²

Can anyone help me and tell me which is correct? I think the problem may

be that I get the volume 29/╥

intead of ╥/29

- geometry/algebra -
**PsyDAG**, Wednesday, November 10, 2010 at 10:05amπ (1²)h = 29

If you divide both sides by π, you get:

h = 29/π

**Answer this Question**

**Related Questions**

math - I asked sue a question yesterday and don't understand the answer can you ...

Health - I posted this question yesterday and I got confused. The determinant of...

geometry - ok, so i don't understand this question. : which postulate justifies ...

algebra/geometry please correct me - You need to make a soda can with a volume ...

algebra - Solve for s in this equation. Depreciation. D=C-s/n This is my answer ...

Math (Trying to understand) 4th - Hi I need help with something. I need to ...

algebra - we are using the distance formula right now and i asked my teacher for...

Math...Algebra :S - Hi, okay um. I'm trying to get his math question (Algebra :o...

math - I asked this question but no one answered it. Can someone please help ...

math - i asked a question yesterday and i got an answer. my question was how ...