A certain cake recipe states that the cake should be baked in a pan 8 inches in diameter. If Salma wants to use the recipe to make a cake of the same depth but 12 inches in diameter, by what factor should she multiply the recipe ingredients?
Solution
Correct Answer: Option B
For 8 inch ,radious =8/2 = 4 inch
Area of cake = πr2h = 16πh
Again for 12 inch cake , area = 36πh
Factor = 36πh/16πh = 2.25
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