maths and cooking question - (why am i so crap at maths?)

[bednobs]

my joint is 860g and it's supposed to roast for 25 mins per 500 g. How do i go abut working out how long to cook it for?

[ummmm]

It does matter Pasta...

Rare beef is ok...

Rare pork = porrly belly..

[pastafreak]

Lol....same here ethandron


must be experience....

[ethandron]

....pasta ;o)

[bednobs]

ok, perhaps i should have been more specific and given all the information?
Well, when i was 15 i took a maths GCSE, and got a "b" in it, however, since then i have not had much call to use maths (plus the GCSE dosen't really teach you practical applications of mathematics). 21 years happened, and at about 14:20 one sunday i found myself standing in front of my fridge scratching my head wondering how long to cook my roast lamb for, lest i give myself food poisoning.
We are also having cabbage, carrots and roast potatoes and perhaps gray and yorkshires (although i will wait till my husband comes home before finally deciding on the yorkshires i suppose) There is a possibility i will get some rosemary in from the garden to cook it with too.

[pastafreak]

of course ummmm....but that is where the experience comes in....you develop a sixth sense,as there are many things that can affect that mathematical cooking time....like proportion of fat to meat,if there is anything else in the oven,the actual temp of your oven...how many times you open the oven door. (ok....maybe I exaggerate a wee bit..lol)
The best thing to do is have a meat thermometer.....then you can check the interior temp.

[ummmm]

It is experience. I can't remember the last time I actually time something.

Lamb is OK....you can have that rare, pink, well done....Now I know it's lamb I would cook it for 40 mins and let rest for as long as poss :-)

[ethandron]

bednobs ;o)
i wasn't allowed to take my maths 'O' level i was so rubbish.