Question

world problem help!

Answer 1

@hartnn i hate to ask but i am desperate...how do you feel about one last question.... i totally understand if you say no... you will not hurt my feelings!

Answer 2

ps this one should be easier

Answer 3

volume of box is ...?

Answer 4

27000

Answer 5

i mean the formula

volume = 150 = length * width * height
y = length

Answer 6

i know that each side is 30 square meters

Answer 7

and since the bottom is a square,
length = width = y

so,
150 = y*y*height
aah, no info. about height

Answer 8

height can be found from volume


150 = height * y^2

height = 150/y^2

makes sense ?

Answer 9

yes

Answer 10

ok, now you have all 3

length = y
width = y
height = 150/y^2

lets calculate the surface area
since it has open top, there will be only 1 base area,
and 4 walls area

Answer 11

base area = length * width = y^2

4 walls area = 4(length * height) = ...

Answer 12

that makes sense

Answer 13

so total area = y^2+ 4(y*150/y^2) = y^2 + 600/y

Answer 14

so then how do i find the total cost of building?

Answer 15

now cost, 8 for bottom, 10 for walls

Answer 16

Cost = 8y^2 + 10*600/y

Answer 17

8y^2 +10(600/y)

Answer 18

?

Answer 19

oh haha i typed that at the same time as you didnt mean to question you

Answer 20

oh, you're correct too , good! :)

Answer 21

thanks for ALL of your help tonight!

Answer 22

welcome ^_^