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Mathematics 23 Online
OpenStudy (song_of_the_sole):

@jhonny9

OpenStudy (song_of_the_sole):

@jhonyy9

OpenStudy (anonymous):

the question please ?

OpenStudy (song_of_the_sole):

Design a new cereal box that will hold the same amount of cereal but reduce manufacturing costs. Prove that your new design holds the same amount but can be manufactured more cheaply.

OpenStudy (song_of_the_sole):

how would i do this

OpenStudy (anonymous):

what was the past length measures of this box for what you got 272 square inch surface area ?

OpenStudy (song_of_the_sole):

l=8 w=2 h=12

OpenStudy (anonymous):

and how many was the volume ? bc. here is very importantly that you need mentioning the volume constant when you change these measures for one surface area smaler

OpenStudy (song_of_the_sole):

192 cubic units

OpenStudy (anonymous):

ok. so how you think how you get this volume from different length measures so that the surface area will result smaler ?

OpenStudy (song_of_the_sole):

im not sure

OpenStudy (anonymous):

looke please area of base now is 8*2=16 so than you minimize this lengths and will get area of base what is 16 from 4*4 so how you think in this way you will get a smaler surface area ?

OpenStudy (song_of_the_sole):

im a little confused your wording is a little harder to understand

OpenStudy (anonymous):

ok. i will try with different words - sorry now area of base is 16 square inch -yes ?

OpenStudy (song_of_the_sole):

yes

OpenStudy (anonymous):

and you have got it this result from length of the base equal 8 and width equal 2 yes ?

OpenStudy (song_of_the_sole):

yah cuz that would be the top

OpenStudy (anonymous):

ok. no problem so than you make smaler this length of 8 on 4 inch and the width make from 2 to 4 greater so will get the same area bc. 4*4 =16 too yes ?

OpenStudy (song_of_the_sole):

oh okay

OpenStudy (anonymous):

so in this way you need calculi now with these 4*4 measures how many will get the surface area - bc. the volume is the same bc. area of base not was changed - yes ?

OpenStudy (song_of_the_sole):

okay..

OpenStudy (anonymous):

please write your calculi of surface area here

OpenStudy (song_of_the_sole):

so you mean re write surface area?

OpenStudy (song_of_the_sole):

with the new cal with the old cal?

OpenStudy (anonymous):

yes with these new dimensions please

OpenStudy (song_of_the_sole):

24+24+4+4+96+96

OpenStudy (song_of_the_sole):

like this?

OpenStudy (anonymous):

how you get these ? i dont understand -sorry

OpenStudy (anonymous):

now the base is a square with length side equal 4 inch

OpenStudy (anonymous):

and the height remain the same equal 12

OpenStudy (song_of_the_sole):

im confused i thought that is what you wanted

OpenStudy (anonymous):

so there are two square on top and bottom with area 4*4 and 4 lateral sides with area 4*12 yes ?

OpenStudy (song_of_the_sole):

yes

OpenStudy (anonymous):

in this case how many will be the total surface area ?

OpenStudy (song_of_the_sole):

so 4*4 and 4*12?

OpenStudy (anonymous):

no

OpenStudy (song_of_the_sole):

then what cuz im a little confused

OpenStudy (anonymous):

4*4 is area of one square but there are two same squares onw on the top and one on bottom so how many will be these than ? and lateral sides with area 4*12 there are 4 sides not just one

OpenStudy (anonymous):

so in thia way the surface area will be equal 4*4*12 + 2*4*4 yes ?

OpenStudy (song_of_the_sole):

okay

OpenStudy (song_of_the_sole):

192 and 32

OpenStudy (anonymous):

yes and assuming these how many will get ?

OpenStudy (song_of_the_sole):

what?

OpenStudy (anonymous):

will be smaler than 272 yes ?

OpenStudy (song_of_the_sole):

yes

OpenStudy (anonymous):

192+32=224 inch squared

OpenStudy (song_of_the_sole):

wait so what would be the surface area of the front?

OpenStudy (anonymous):

so than you see we have made this surface area smaler from 272 inch squared on 224 inch squared

OpenStudy (song_of_the_sole):

wait so just to clarify what is the surface area of the front side and top?

OpenStudy (anonymous):

what mean to you here the front side and top ?

OpenStudy (song_of_the_sole):

cuz its a cereal box

OpenStudy (anonymous):

looke please i said above that there are on the base a square and same on the top,bottom too

OpenStudy (anonymous):

with side length 4 so area of a square is side time side yes ? than will be 4*4=16

OpenStudy (anonymous):

and the height remain same with first dimensions equal 12 bc. you need mentioning the volume equal 192 unit cubic

OpenStudy (song_of_the_sole):

so what would be the surface area of the top to clarify because ur wording is confusing and not clear

OpenStudy (anonymous):

the top and bottom side is a square with area 16

OpenStudy (song_of_the_sole):

so the length is?

OpenStudy (anonymous):

what length ? this is a square on the top and bottom and the height remained the same 12 inch

OpenStudy (song_of_the_sole):

because with the original box the length was 8 the width is 2 and height was 8

OpenStudy (anonymous):

these you have wrote above on the top l=8 w=2 h=12

OpenStudy (anonymous):

so the heght is 12 and not 8

OpenStudy (song_of_the_sole):

l=8 w=2 h=12

OpenStudy (song_of_the_sole):

i mean height was 12 ^^^

OpenStudy (anonymous):

yes do you see it now

OpenStudy (song_of_the_sole):

so with our new cal what would be the new l w and h?

OpenStudy (anonymous):

bc. the base is a square so on the top will be a square too with sides length 4 so area of the top and bottom sides will be 4*4=16 bc. we need mentioning the volume constant yes ?

OpenStudy (anonymous):

before was the area of base 8*2=16 so now will be 4*4=16 and the height not will be changed

OpenStudy (song_of_the_sole):

so what is the length since the area of the base is 16

OpenStudy (anonymous):

length of what ?

OpenStudy (anonymous):

the height is 12

OpenStudy (anonymous):

how many was before

OpenStudy (song_of_the_sole):

yes the original is l=8 w=2 h=12

OpenStudy (anonymous):

and now for we get ,minimize the surface area and with this the cost of ... so we made smaler the base length 8 on 4 and the width from 2 greater on 4 too and hence we have got surface area equal 224 inch squared when firstly what was 272 inch squared

OpenStudy (song_of_the_sole):

wait so the l=8?

OpenStudy (anonymous):

not 8 was firstly now is 4

OpenStudy (song_of_the_sole):

so what w?

OpenStudy (anonymous):

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