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# Need help in Maths, URGENT watch

2. (Original post by LisaCasvano)

So, she takes the beef out of the fridge. Then there are three stages:

Period before roasting, which takes....

Roasting.

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,

Can you take it from there?

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