Hakuna Matata

A Puzzle out of Another !

I was trawling thru the dustier corners of our old mail server to make sure I dont lose any
important(eh ?) mail if they move it offline !
This is the puzzle I recieved 75+ responses for !!
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Here it goes ...
A goat is tied by a long rope to one corner of a square house whose sides are 30 metres long. The length of the rope is 60 metres -- long enough to allow the animal to graze over a large part of the property surrounding the house on the back, front and sides. What is the maximum number of square metres of this property can the goat graze?
I was wondering what if the rope's size is incresed to lets say 70 m ? Not as simple as the previous one then.

PS: Assume a greedy goat ;-)
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The variation in the puzzle(latter part) was just an impulse of thought. But It turned out to be much more interesting than it looked prima facie and probably worth posting :).

posted by Praveer @ Monday, August 16, 2004