On Fri, 26 Jan 2001 sdillen@ca.ibm.com wrote:
> You are given 2 pieces of string and a book of matches. The two pieces of
> string are of different diameter and length. You are told that each string
> will burn in exactly 30 minutes -- but that the rate of burn will not be
> constant. Using only the items given, explain how you can time exactly 45
> minutes. You have 15 minutes to come up with an answer. . .
1) light one string at one end. let it burn. time: 30 minutes.
2) when string #1 finishes, light the other string at both ends (at the
same time). let it burn. time for string #2: 15 minutes. total time: 45
minutes.
scott
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