Please solve this!

[X]

(This is from MICROECONOMIC THEORY by Nicholson and Snyder )
The answer at the end of the book is "A circular field encloses maximal area for minimum
perimeter. Proof requires a limit argument."

But, how to show(prove) that? If you know formal proof, it is best.If not, intuitions will help me a lot.
 Thank you.

[Akshay Jain]

[Akshay Jain]

hope dis can give u sm idea.....m not sure bout d proof

[X]

Many many thanks Akshay for sparing your precious time for me!

You have done great efforts for me, but the quality of image is no very good, so I am unable to read it.

But I feel glad as I am answered by a DSE student!

Thank you.

[Akshay Jain]

m really not sure about dis proof.....so its better if you ask amit sir to solve this...
and no need of thanx yr......what i got from dis forum.....i wanna give d same.......all the best...:)

[X]

Thanks again as you are the biggest helping hand for me.

Can you please tell me how to contact Amit Sir?

[Akshay Jain]

u can drop him a mail through forum....