SOLUTION: A certain cake recipe states that the cake should be baked in a pan 8 inches in diameter. if jules wants to use the recipe to make a cake of the same depth but 12 inches in diamet

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Question 323966: A certain cake recipe states that the cake should be baked in a pan 8 inches in diameter. if jules wants to use the recipe to make a cake of the same depth but 12 inches in diameter, by what factor should he multiply the recipe ingredients ?
A 2 1/2 B 2 1/4 C 1 1/2 D 1 4/9 E 1 1/3
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
you have to compare the ratios of the area OR the ratio of the squares of the radius.
12" dia = 6" radius
8" diameter = 4" radius
..
r^2= 36
r^2=16
..
Ratio = 36/16
=2.25 times
OPTION B