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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
 #1
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Already answered in the next post down on the forum....

 Apr 5, 2021
 #2
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Hey there, Guest!

 

So this question has already been semi-answered here: https://web2.0calc.com/questions/dora.

 

Building off of what HighSchoolCalculus said...

 

We would burn the 5 hour one first with the 4-hour candle.

That would automatically give us 5 hours.

 

Then, when the first 4 hours are up, we would replace it with the 3-hour candle.

That gives us one more hour because of the limits of the 5-hour candle.

 

Now, do the addition:

5+1= 6 hours

 

Hope this helped! :)

( ゚д゚)つ Bye

 Apr 5, 2021

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