Thread: I hate word problems

theres a rectangular box, where the material for the lid is 35 times more expensive per/m2 then the material for the rest of the box.The volume is 3m3. I need to find the dimentions for the minimum cost.

I did a diagram. That's my speciality, but am stuck after that.(the blank page scares me).

any aid would be terrific.

Let x=length, y=width, z=heighth

The volume is given by

The dimensions:

top=xy

bottom=xy

sides: 2xz

ends: 2yz


Cost for all but top=c(xy+2yz+2xz)

Cost for top=35c(xy)

Total cost=35c(xy)+c(xy+2yz+2xz)


Does this get you started?.