View Full Version : help me!


Captain_Crunch
12-18-02, 05:40 PM
Hi, ive never posted in this section before but its urgent.

How would it be possible to convert m^2 into m^3 if possible at all?

thats it really.

cheers.

:)

James R
12-18-02, 05:52 PM
What's the application?

Captain_Crunch
12-18-02, 05:58 PM
yeh, i just realised that it didnt make any sence the way I put it.

um, right,

cost of concrete is £37.00 per m^2
i then need the cost of it in m^3.

I think i know how to do it now but im not 100% as im very tired.

cheers.

Prosoothus
12-18-02, 06:03 PM
Captain_Crunch,

cost of concrete is £37.00 per m^2
i then need the cost of it in m^3.

Just multiply 37 by the square root of 37.

Tom

Captain_Crunch
12-18-02, 06:07 PM
Thank you Prosoothus!!! :D
I was going to do it:

square root of 37.00 cubed.
Gives the same answer anyhow.

thank you!

Prosoothus
12-18-02, 06:07 PM
Captain_Crunch,

Let me correct my previous post.

The m^2 of concrete you are talking about has to have a thickness. Knowing this thickness will help you figure out how much a m^3 of concrete costs.

Tom

Captain_Crunch
12-18-02, 06:11 PM
i dont know the thickness that why i didnt know if it was possible before.

i'll just do like you said in your previous post even if it isnt the correct answer. its roughly correct.

Prosoothus
12-18-02, 06:17 PM
Captain_Crunch,

i'll just do like you said in your previous post even if it isnt the correct answer. its roughly correct.

It may not be even roughly correct.

For example, if the m^2 of concrete is 1 meter thick, then a m^3 of concrete costs 37 pounds.

However, if the m^2 of concrete is only 10 cms thick, then one m^3 of concrete would cost 370 pounds.

Tom

Captain_Crunch
12-18-02, 06:20 PM
I see what your saying and thanks for pointing this out to me. I can get round this by stating that i have took the concrete to be 1 meter thick.

chroot
12-18-02, 06:20 PM
There is no way to convert from m^2 to m^3, even roughly. It doesn't even make sense to talk about the price of concrete per m^2, since concrete is sold by volume.

- Warren

Captain_Crunch
12-18-02, 06:31 PM
-Warren

im sleepy.

Captain_Crunch
12-18-02, 06:36 PM
if i take the price per m^2 to be 1 meter thick it then has a volume thus everythings ok. i think.

*yawns*

On Radioactive Waves
12-18-02, 06:38 PM
if it were sold by area, it would still have a thickness and thus be a volume.

tom, what were you thinking!!! (nevermind, I can probably figure....)

Captain_Crunch
12-18-02, 06:40 PM
arrghh, whats going on?. someone please explain. cant handle complications.
:confused:

zzz

:)

On Radioactive Waves
12-18-02, 06:52 PM
you're question was confusing to begin with. if you state your problem how it was specified....

basicly from the first question you wrote, you wanted to convert two dimensions to three.

Captain_Crunch
12-18-02, 06:57 PM
yeh, but if i take

square root of 37.00 = 6.082
=6.082 x 6.082 x 6.082
= 225.062
=£225.06

that should be cool.

On Radioactive Waves
12-18-02, 07:01 PM
yes but that implies that you have an area, or three dimensions with one of them being zero.

if i have x number of meters squared of concrete of thickness 0, then i have no concrete, reguardless of what number x is..... you see?

there must be an implied thickness to it.

Captain_Crunch
12-18-02, 07:04 PM
if i have x number of meters squared of concrete of thickness 0, then i have no concrete, reguardless of what number x is..... you see?

yes.

so how would i incorporate a thickness of 1m into the equation?

On Radioactive Waves
12-18-02, 07:08 PM
if the thickness is 1 m, then m^2 = m^3


that is to say, for every square meter of surface area you can stand on, there is 1 cubic meter of concrete benethe your feet

Captain_Crunch
12-18-02, 07:11 PM
o.k, so this still stands as the correct answer:

square root of 37.00 = 6.082
=6.082 x 6.082 x 6.082
= 225.062
=£225.06

or does that mean:

£37.00per m^2 = £37.00 per m^3 ??!!

cheers

On Radioactive Waves
12-18-02, 07:15 PM
if you imply that it has 1m thickness, then yes it would be still 37

if you're not sure, and this is homework, you could always write both solutions and explain. i think it probably is 37*sqrt37, but it may be one of those trick questions.

what class is this for?

Captain_Crunch
12-18-02, 07:19 PM
This is for quantity surveying course project at uni.

£37.00 isnt the actual price, i just took it to that so if anyone did give me any help it wouldnt be a case of copying or whatever.

they just handed it out to us and we have to get on with it. after theyve marked it, then i know if i got it wrong or not.

On Radioactive Waves
12-18-02, 07:24 PM
hmmm... i think then, the answer would somehow incorerate a thickness.

what information is given to start with?

Captain_Crunch
12-18-02, 07:29 PM
i just got '37.00'

thats it, i had to gather all the other numerics from here and there and do a price sheet for concrete (which im doing just now) with all different mix proportions. there is so many variables its hard to give u all the numbers.
anyhow, i have a feeling i have figured it out now from what yous have said.

Captain_Crunch
12-18-02, 07:40 PM
still have time to correct it tommorrow anyhow.
thanks for all the help, im going to bed as im starting to have a sore head from tiredness.

later.

Joeman
12-18-02, 10:33 PM
How I interpret this is you are given a price of an area with infinitesimal thickness.

If the thickness is 1m, then you integrate over dt with 1 meter being your integration limit. 225 is what you are gonna get.