[soze=3]Hello, dklee41![/size]

The stiffness of a rectangular beam is jointly proportional

to the breadth and the cube of the depth.

Find the dimensions of the stiffest beam that can be cut from a log

in the shape of a right-circular cylinder of radius centimeters. Code:

* * *
* *
*-------+-------*
*| : |*
| y: |
* | : | *
* | * | *
* | : \ | *
| y: \a |
*| : \ |*
*-------+-------*
* x x *
* * *

The breadth is , the depth is

Since , we have: . **[1]**

From the diagram we have: . **[2]**

Substitute [2] into [1]: .

And **that** is the function we must maximize . . .