Enclosing land by fence pieces.(Microsoft puzzle)

Puzzle
You are given one 44-meter piece of fence and 48 one-meter pieces of fence.  Assume each piece is a straight and unbendable.  What is the large area of (flat) land that you can enclose using these fence pieces?

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Picking larger of two cards from 13 cards.(microsoft riddle)

Puzzle:
Someone picks two cards from a deck of cards. The cards have one is higher than the other. (In other words, the person picks two distinct numbers in the inclusive range 1 through 13.)  The cards are placed face down on table in front of you.  You get to choose one of the cards and turn it face up.  Now, you will select one of the 2 cards (one of whose face you can see, the other one you can't).  If you select the highest card, you win.  Design a card-selection strategy for which your chance of winning is strictly greater than 50%.

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