1. ## Dieriveing mathamatical modells

Ok so I have some questions and not sure if my maths is right, apoligies of this is posted in wrong place. see attachment for diagram of open topped box with dimentions, sorry about poor drawing, units in cm

1. Dirive a mathematical formula for the surface area of box?

16 x 48 = 768 x2 = 1,536
16x 64 = 1,024 x2 = 2,048
48x64 = 3,072

2. if each box is cut from 1m squared piece cardboard, how much wastage is there per unit?
10,000 - 6,656 = 3,344com

3. how many boxes can be cut from a ten meter square sheet of cardboard

10,000 x 10 = 100,000 / 6,656 = 15 boxes

can anyone confirm this is correct

2. ## Re: Dieriveing mathamatical modells

1.) and 2.) look good.

3. ## Re: Dieriveing mathamatical modells

3/3 words misspelled. It's "Deriving Mathematical Models."

1) and 2) look correct...alternatively for 1), you can subtract off 4 16cm x 16cm from a large rectangle.

For 3), is it 10 m^2, or a square of dimension 10 m x 10 m? From a practical standpoint, we can't really wasted pieces of cardboard to make a box; we have to cut out full pieces.

4. ## Re: Dieriveing mathamatical modells

humm i think its 10^2

10,000 cm is 1m^2
100,000 cm is 10 m^2

my next line was

100,000cm / 6,656cm^2 (surface area of box)

am i missing a step?
because the first figure is cm , and second is cm^2 so am i right in thinking i cant divide numbers with different values from each other

5. ## Re: Dieriveing mathamatical modells

Thanks sharing your information.Its looking nice.
Georgetown Mortgage Bank - Austin

6. ## Re: Dieriveing mathamatical modells

wtjohnson12, how much do you get paid for forcing advertising onto websites that you do not pay for the advertising?

ronanbrowne, what you have is an answer but not a "mathematical model". A "mathematical model" would be something like "the total surface area of a rectangular solid with edge lengths a, b, c is 2ab+ 2ac+ 2bc" or, in this particular case, "the area of the large (48+ 32) by (64+ 32) rectangle minus 4 times the area of the 16 by 16 squares that are cut off".