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24/07/2018 at 02:43
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A candle that burns at a uniform rate was 11 inches tall after burning for 4 hours and 8 inches tall after burning for a total of 6 hours. How many inches tall was the candle before it was lit? 


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    Lê Anh Duy 24/07/2018 at 09:42

    11 inches tall after burning for 4 hours

    8 inches tall after burning for 6 hours

    \(\Rightarrow\) Every 6 - 4 = 2 hours the candle was 11 - 8 = 3 inches shorter

    \(\Rightarrow\) After 4 hour the candle was 6 inches shorter

    \(\Rightarrow\) The candle was: 11 + 6 = 17 (inches) tall

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