A,B,C and D are four cities such that ABCD has the precise shape of a square with each side equal to 100 kilometers.

A railway network needs to be constructed connecting all the cities. Determine the minimum total length of this network. Prove that this is indeed the minimum network length.

(In reply to A good browse. by Jer)

A good browse, indeed.  Thanks, Jer

Posted by Larry on 2013-04-06 14:11:11