Help applied problem max & min

  • #1

Homework Statement



A wire that is 7 feet long is to be used to form a square and a circle. How much of the wire should be used for the square and how much for the circle to enclose the maximum area?

Possible Solutions:
a. o feet for the square and 7 feet for the circle
b. pi/7 feet for the square and 49-pi/7 feet for the circle
c. 7/4+pi feet for the square and 7pi+21/4+pi feet for the circle
d. none of these


Homework Equations



volume?
circunference?


The Attempt at a Solution



differentiate and equal to cero... but I need to find the equation first

please help.. and thanx!!
 

Answers and Replies

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