SOLUTION: There are 3 Pizza with different diameters. pizza with 7cm dia costs $70, pizza with 14cm dia costs $350 and pizza with 21cm dia costs $700. Which pizza is the best value for money

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Question 346406: There are 3 Pizza with different diameters. pizza with 7cm dia costs $70, pizza with 14cm dia costs $350 and pizza with 21cm dia costs $700. Which pizza is the best value for money?
Answer by Alan3354(69443) About Me  (Show Source):
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There are 3 Pizza with different diameters. pizza with 7cm dia costs $70, pizza with 14cm dia costs $350 and pizza with 21cm dia costs $700. Which pizza is the best value for money?
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Area is a function of the square of the diameter.
14cm dim = 4 times the area of the 7 cm at 5 times the price
21cm dim = 9 times the area of the 7 cm at 10 times the price
The smallest one costs the least per unit area of pizza, and is the "best deal", neglecting any other factors.