Monday

October 20, 2014

October 20, 2014

Posted by **CMM** on Tuesday, October 12, 2010 at 5:13pm.

Please help and explain. I have an exam shortly and a similar question will be on it.

- Calc- Urgent Please -
**Reiny**, Tuesday, October 12, 2010 at 5:46pmIf the base is x by x, let the height be y

Volume = (x^2)y

x^2y = 500

y = 500/x^2

surface area = x^2 + 4xy

= x^2 + 4x(500/x^2 = x^2 + 2000/x

d(surface area)/dx = 2x - 2000/x^2

= 0 for a max/min of surface area

2x - 2000/x^2 = 0

x^3 = 1000

x = 10

**Answer this Question**

**Related Questions**

calculus - A rectangular box is to be constructed from two different materials. ...

Calc - A rectangular box, with a square base and open at the top is to be ...

Pre-calc - A cardboard box with an open top and a square bottom is to have a ...

math - a piece of cardboard is twice as it is wide. It is to be made into a box ...

calculus - A box of volume 72m^3 with square bottom and no top constructed out ...

calculus - A box is constructed out of two different types of metal. The metal ...

calc - What function should be used to maximize the volume of an open box that ...

calculus - This is problem 16 Section 4.6 page 246. A closed box with square ...

calculus - An open box is to be made. This box is to have a bottom and four ...

Calc - A box has a bottom with one edge 3 times as long as the other. If the box...