Wednesday, May 6, 2009
You are in an empty room and you have a transparent glass of water. The glass is a right cylinder, and it looks like it's half full, but you're not sure. How can you accurately figure out whether the glass is half full, more than half full, or less than half full? You have no rulers or writing utensils.
Solution (Highlight): Tilt the glass to the side so that the water reaches the open end of the cup, but none spills out. If the water on the inside of the cup covers exactly the base of the cup, it is half full. Any more and it is more than half full and any less and it is less than half full.
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