Posted by wan on Saturday, March 16, 2013 at 7:09am.
2candles,one green and one red,are lit at the same time.The green candle burns twice as fast as the red one.The green candle burns burns out after 6 hours,how much time will elapse before the red candle burns out ?

math  Reiny, Saturday, March 16, 2013 at 8:06am
umhh, another 6 hours ?
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