Apparently loads of people didn't pay attention in Junior Cert maths, as they are astounded that the area of a 18-inch pizza is bigger than the area of two 12-inchers.
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An 18-inch pizza has 254 square inches of pizza, whereas two 12-inch pizzas only have around 226 square inches.
The classic way of working out the size of a circle is dividing its diameter by two to work out the radius, then squaring it and multiplying it by pi. Which works out the total area of the circle (or pizza).
Here's a useful counterintuitive fact: one 18 inch pizza has more 'pizza' than two 12 inch pizzas pic.twitter.com/hePSpG0pJs
— Fermat's Library (@fermatslibrary) January 7, 2019
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The amount of multiplication means that small changes in the diametre of the pizza lead to much bigger changes in the area.
A 10-inch pizza, for example, is 78 square inches, with a 12-inch pizza a comparative 113 square inches. A 14-inch pizza comes in at 153 inches, so roughly the same size as 10-inchers.
All of this is worth bearing in mind when you're ordering and working out the most cost-effective option.
And, judging by social media, a lot of people's minds were blown:
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pic.twitter.com/ElE2yc1Fsy
— Mark Sykes (@MarkSykes15) January 7, 2019
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And 12 + 12 = 24 which is more than 18. This must be quantum physics. I hear all kinds of strange things happen there.
— Scott Eisenberg (@rscotteisenberg) January 7, 2019
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You're not encouraging me to eat smaller pizzas, here... pic.twitter.com/HEBoEqxdVm
— Chris Armstrong (@DrCDArmstrong) January 7, 2019
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Check out the newer version!
How many times have you wondered whether it's better to get 2 medium pizzas or just 1 large pizza? Probably quite a few. What pizzerias usually tell you is a diameter of the pizza pie, but we don't eat the diameter. We don't eat the circumference either. What we eat is the area of the pizza. It's very basic maths that revolves around the equation Area = Radius^2 * Pi, but we're often in too much of a hurry, or just can't be bothered to calculate it in our heads. That's why we built this pizza comparison tool to solve these problems once and for all.
The calculator requires minimal effort from you. Simply type in the diameter, price and number of smaller pizzas and repeat it for the larger pizza(s) you're considering. This tool will show you the total area and price of each pizza and how they compare against each other, expressed as a percentage. If you just want to compare the areas just skip the prices - this tool will work either way. Units will be defaulted to your country's units but feel free to switch between metric and imperial as you wish or maybe you could grab 3000 millimeters worth of pizza!
It's worth noting that it's almost always more cost-effective to opt for a larger pizza. As is the case in any other industry, pizzerias have better margins / markups on smaller products. The table below shows how quickly a pizza's area grows as the pizza diameter increases. As a result an 18-inch pizza is over 3 times larger than a 10-inch one. At the same time grabbing a monster 61-centimeter pizza will feed more people than 2 40-centimeter ones or nearly 6 25-cm pies.
| 10 | 79 | 25.4 | 507 | 1 |
| 12 | 113 | 30.5 | 730 | 1.4 |
| 14 | 154 | 35.6 | 993 | 2.0 |
| 16 | 201 | 40.6 | 1297 | 2.6 |
| 18 | 254 | 45.7 | 1642 | 3.2 |
| 20 | 314 | 50.8 | 2027 | 4.0 |
| 22 | 380 | 55.9 | 2452 | 4.8 |
| 24 | 452 | 61 | 2919 | 5.8 |
Make sure you use our calculator you next time you order a pizza. You'll be grateful you did the maths once your order arrives. Now it's not only discounts that can save you money!
Mathematics, 23.11.2019 21:31 debbys1802
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