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Dora has three candles, which will burn for 3, 4 and 5 hours, respectively. If she wants to keep two candles burning at all times, what is the greatest number of hours she can burn the candles? (Dora has a clock that she can use to time the candles.)

 Apr 5, 2021
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She has a total burn time of    3 + 4 + 5 = 12 hours

  if two are burning at a time she has a total time available of  12 / 2 = 6 hours

 Apr 5, 2021
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Thank you so much!! 

Guest Apr 5, 2021

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