ive been working on this for so long, id really appreciate some help. An open-topped aquarium holds 40 cubic feet of water and is made of 60 square feet of glass. The length of the aquarium’s base is twice its width. Find the dimensions of the aquarium.

Question

anonymous · Answer

Janes4, I would recommend that you start by setting up some equations.

anonymous · Answer

Such as $$V=40$$.

anonymous · Answer

$$2lw+2lh+2wh=60$$ (where l, w, and h are the lengths of the sides)

anonymous · Answer

and, $$l=2w$$

anonymous · Answer

so far i have 40=2(w^2)h and h=20/w^2

mertsj · Answer

$$lwh=40; l=2w; 2w(wh)=40; 2w^2h=40;w^2h=20$$

joannablackwelder · Answer

It looks like lw + 2lh + 2wh =60 to me since it is open-topped.

mertsj · Answer

|dw:1382405870146:dw|