Friday

January 30, 2015

January 30, 2015

Posted by **Heidi** on Friday, January 26, 2007 at 9:55pm.

You can see this better if you draw a rectangular box. The base is x and x so the area will be x^2.

The volume of the box is x^2 x height = x^2*h = 320 so solving for h we have

h=320/x^2.

Now figures the cost.

For the bottom the area is x^2.

The cost is 1.50/ft^2*(x^2) = ??

The cost of the top is

2.50/ft&2 *(x^2) = ??

The area of the sides is

h*x = (320/x^2)*x and the cost is that times 2.50/ft^2 and that times 2 (since there are two sides. Remember to put this cost in terms of x.

Then add all the costs.

Post your work if you get stuck.

Thx! I was making this harder than it needed to be! I originally got started like you said and thought it looked too easy!

**Answer this Question**

**Related Questions**

math - A rectangular box with a volume of 320 cubic units is to be constructed ...

Calculus - dimensions of a box? - A rectangular box with a square bottom and a ...

Calc - A closed box with a square base is to be constructed so that its volume ...

math - A box with a rectangular base and rectangular sides is to be open at the ...

Calculus - A rectangular box is to have a square base and a volume of 20 ft3. If...

Math - Ignoring the walls’ thickness, determine the outside dimensions that will...

Math - Ignoring the walls’ thickness, determine the outside dimensions that will...

calculus - a rectangular box with a square bottom is to have a volume of 1000 ...

Calculus - A rectangular box with square base (which is NOT necessarily a cube) ...

Calculus - A rectangular box with a square base and top is to be made to contain...