Question

Which one of these is a better buy? A large pizza with a 12 inch diameter that costs $14, or a medium pizza with a 6 inch diameter that costs $5.

The Large?

Thanks

Answer 1

Let's look at the areas and the cost per square inch of each of these pizzas.

A = pi * r^2
A = 3.14 * 6^2
A = 113.04 square inches
14 / 113.04 = $0.12 per square inch

A = 3.14 * 9
A = 28.26 sq. in.

5/28.26 = $0.18 per square inch

Yes. The larger pizza is a better buy.