On Sun, 10 Feb 2008 17:39:00 -0800, Dave Bell >
wrote:

>sapsi wrote:
>> Hello,
>> I have a recipe for a cake which requires 100gm of flour and 100gms of
>> butter and two 7" pans. If i change it to a 9" pan, do i
>> a) multiply the weights of flour and butter by 9/7?
>> or
>> b) multiply by ratio of areas i.e multiply by 81/49 (9^2/7^2) ?
>
>The latter will give you the same depth of layer.
>And congratulations on doing the maths right!!
>So many don't have a clue...

Probably as many as don't know the difference between the diameter and the
radius -- or the circumference and the area. 8

-- Larry