Elio makes candles that are 14 cm tall. Each candle burns 8 hours before going out. He is wondering how many hours at 21 cm tall candle will burn. How long will a 21 cm tall candle burn?

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asked Jun 25, 2019 162k views

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Elio makes candles that are 14 cm tall. Each candle burns 8 hours before going out. He is wondering how many hours at 21 cm tall candle will burn. How long will a 21 cm tall candle burn?

Mathematics
college

Louis Kriek asked

by Louis Kriek

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The answer is 12 hours. I got it right on my Khan Academy.

Jeffery Thomas answered Jun 26, 2019

by Jeffery Thomas

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2 votes

I would use ratio.
14:8 divide 2
7:4 times 3
21:12
12 hours before going out.

LumberHack answered Jul 1, 2019

by LumberHack

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