|
Un article trouvé pour ce sujet.
 |
|
|
|
|
|
|
|
|
Two candles |
1999-11-24 |
|
Skip Simpson pose la question :
You have two candles the same length. They are lit at the same time. One burns down in 4 hours; the other in 5 hours. How long does it take before one candle is three times the length of the other candle?
Walter Whiteley lui répond. |
|
|
|
