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Math Help - Ratio Problem

  1. #1
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    Ratio Problem

    Hi everyone, sorry to be thick but I was wondering if somebody could answer me a simple question that I keep getting different answers to when trying to work out.

    If there are 18 calories in 100ml bottle of squash, how many calories in 1.75 litres of the stuff?

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  2. #2
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    Re: Stuck with simple question

    Let's first convert 1.75 litres to ml. Simply multiply 1.75*1000 = 1750. Now set up a simple ratio:

    18/100 = x/1750.

    Cross multiply and divide:

    100x=18*1750

    x=18*1750/100=315 calories.
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  3. #3
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    Re: Stuck with simple question

    Quote Originally Posted by carpediem View Post
    Hi everyone, sorry to be thick but I was wondering if somebody could answer me a simple question that I keep getting different answers to when trying to work out.

    If there are 18 calories in 100ml bottle of squash, how many calories in 1.75 litres of the stuff?

    Use a ratio:

    100ml : 18cal
    1750ml: x cal

    We can divide each side of the ratio to give \dfrac{x}{18} = \dfrac{1750}{100}

    Solve for x
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  4. #4
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    Re: Stuck with simple question

    Thankyou! Saved my day =]
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