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    • Thread Starter

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    I'm finding this quite tricky please help
    • Study Helper

    Study Helper
    (Original post by LisaCasvano)
    Name:  image.jpeg
Views: 66
Size:  88.2 KB
    I'm finding this quite tricky please help
    So, she takes the beef out of the fridge. Then there are three stages:

    Period before roasting, which takes....


    Period after roasting, which takes....

    For the roasting you have a formula which gives the time for 450g. You have 1.5kg, which is 1500g. So, number of lots of 450g is 1500/450 = 10/3

    Roasting time (for medium) is therefore, \frac{10}{3}\times 25 + 25

    Can you take it from there?
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