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How much coal (in metric tonnes) will be needed for 8 engines, each running 10 hours a day?

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If 5 engines consume 6 metric tonnes of coal when each is running 9 hours a day, how much coal (in metric tonnes) will be needed for 8 engines, each running 10 hours a day?

posted May 21, 2015 by anonymous

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1 Solution

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Each engine consumes 6/(5*9) = 2/15 metric tonne of coal an hour. Therefore, the 8 engines will consume 10.67 metric tonne of coal a day.

solution May 29, 2015 by Jcm

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