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Math Help - finding how many millilitres in cup

  1. #1
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    finding how many millilitres in cup

    How many ml does 85 cups hold if 1 cup holds 140 ml? Then subtract this number from 12 000 ml to gey your answer.


    I have done 85 x 140 ml = 11900ml and 12000 - 11900 = 100ml.
    Last edited by mr fantastic; August 24th 2010 at 07:53 PM. Reason: Re-typed in lower case.
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  2. #2
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    would it be 12000 - 700 = 11300 ml
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  3. #3
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    Is this the full question? If not could you please write the full question because i don't quite understand why you need to subtract your answer from 12000. Once you rewrite it somebody may be able to attempt to help you.
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  4. #4
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    replying to question

    The full quesiton is
    A coffee urn holds 12 litres when full. Harry fills coffee cups from the urn until the coffee runs out.
    (a) How many 140ml cups of coffee can be filled from the urn?
    (b) At the end there is not enough coffee left to fill a cup. Harry decides to drink it himself. How much coffee is there left for him?

    I have gotten a correct by doing 140/12000 = 85.7
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