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Mathematics 14 Online
OpenStudy (anonymous):

A rectangular box that is 7 inches by 5 inches by 3 inches is covered by foil. How much foil is required?

OpenStudy (anonymous):

find the surface area of the cube

OpenStudy (anonymous):

you need 2(7*5 + 5*3 + 7*3) square inches of foil

OpenStudy (anonymous):

I don't get it. is that the formula or what? geometry is not my thing.

OpenStudy (anonymous):

please show all work.

OpenStudy (anonymous):

for a cube with length L , width W and height W, the surface area is 2(LW+LH+HW)

OpenStudy (anonymous):

so yes, that is the formula

OpenStudy (anonymous):

you mean height=H. lol.

OpenStudy (anonymous):

ya thats what I meant

OpenStudy (anonymous):

thanks.

OpenStudy (anonymous):

np

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