Area HELP

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• Jan 20th 2008, 01:34 PM
nodzak1992
Area HELP
Area HELP (Speechless)

800cm(cubed) of milk is to be stored in a container.

what area of metal is required to make a carton 16 cm high of square cross-section so that it will hold the milk?
• Jan 20th 2008, 02:13 PM
a tutor
Quote:

Originally Posted by nodzak1992
Area HELP (Speechless)

800cm(cubed) of milk is to be stored in a container.

what area of metal is required to make a carton 16 cm high of square cross-section so that it will hold the milk?

Say the side of the square base has length x.

What's the area of the base in terms of x?
What's the volume in terms of x?
If this volume = 800 then what is x?

With that value of x what are the areas of the six rectangular faces?
• Jan 20th 2008, 02:17 PM
nodzak1992
is the base 800/6 = 133.3
• Jan 20th 2008, 02:20 PM
a tutor
Quote:

Originally Posted by nodzak1992
is the base 800/6 = 133.3

If the base is a square with sides of length x what is the area of the base in terms of x?
• Jan 20th 2008, 02:21 PM
nodzak1992
x squared?
• Jan 20th 2008, 02:22 PM
a tutor
Quote:

Originally Posted by nodzak1992
x squared?

Correct. So what is the volume in terms of x?
• Jan 20th 2008, 02:24 PM
nodzak1992
whats the equation for the volume (Angel)
• Jan 20th 2008, 02:26 PM
a tutor
Volume of a cuboid = length x width x height
• Jan 20th 2008, 02:27 PM
nodzak1992
(x) x 800 x 16?
• Jan 20th 2008, 02:29 PM
a tutor
No. Just write an expression for the volume in terms of x.
Leave the 800 out for now.
• Jan 20th 2008, 02:31 PM
nodzak1992
(x) x 16 x (x) squared?
• Jan 20th 2008, 02:38 PM
a tutor
Do you mean 16x^2 ?

That's correct.

So since this is the volume 16x^2=800.

Can you solve that to find the value of x?
• Jan 20th 2008, 02:41 PM
nodzak1992
squared root of 784 = 28 ?
• Jan 20th 2008, 02:46 PM
a tutor
No, don't subtract 16.

Divide both sides of the equation by 16

16x^2=800

x^2=800/16

x^2=50

Now square root both sides.

What are things like in your maths class? Chaotic?
• Jan 20th 2008, 02:49 PM
nodzak1992
x = 7.07 , now what?

yeah very !
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