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Sign or "The Princess in the Lake" or "π"

|| Please don't use this image without my explicit permission. || FreiRaum - My Blog || View On Black ||

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The princess in the lake

 

A princess decided one day to the circular lake far from the castle of her father to go swimming. As soon as she got into the water, suddenly appeared a witch who wanted to kidnap the girl. The Princess swam quickly in the middle of the lake to think about an escape plan. They put three things that:

 

1 'The witch can run four times as fast as I can swim. "

2 "The witch always try to stay as close to my turn."

3 "On land I'm faster than the witch."

 

How can the girl under these conditions, the witch escape?_____________________________________________________________________________

 

Solution || Q.E.D. = quod erat demonstrandum ||

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Uploaded on May 15, 2013
Taken on May 12, 2013