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13 August, 15:30

Elio makes candles that are 14cm tall. Each candle burns 8 hours before going out. He is wondering how many hours a 21cm all candle can burn for. He assumes that the relationship between the height of a candle and number of hours it burns (h) is proportional. How long a 21 cm tall candle can burn for?

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  1. 13 August, 18:33
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    Answer: 12 hours

    Step-by-step explanation: we know a 14cm candle takes 8 hrs until it burns out so a 7cm candle will take 4hrs since it's cut in half. If we add 7cm more to the candle it's 21cm which adds 4 more hours to the original 8 hours.
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