it feeds 2 normal adults, maybe more if they are kids or women
8
The area of a 16" pizza is 201.2 sq inches which is 0.1297 sq metres
I suggest you divide the 14 inches and the 11 inches by 2 to get the radius (presumably, the numbers refer to the diameter). Then you can calculate the area using the formula for a circle, and compare.
Thinking reasonable slices here, I thought it out a minute and it is reasonable to say, about 8 people for an 8 inch cake. Taking a picture of an 8 inch circle (to scale) and drawing on it first a line across the middle center, and then to make it fours, and two more lines across and you get 8. SO 8 :D
A pizza typically contains about 8-10 slices. If it's just for a snack, two pizzas should be enough for everyone to have at least one slice. If a meal, 4 pizzas will allow 13 people to have at least 2 slices, with some extra for hungry people.
An entire village in South Africa.
6 Slices = 2-3 pax
It depends on how big/small the pieces are.
Area of a 14 inch pizza = 43.98in2. Area of a 12 inch pizza = 37.70in2. Difference between the two = 6.28in2.
It matter where you buy the pizza
As many as you want. You decide.
A large Domino's Pizza is about 14 inches in diameter and is typically cut into eight slices. It can be expected to feed about 3-5 adults, on average.
2
49pi-36pi= 13pi= 40.8 square inches
I think you should do some math. Assume every person will eat up to 2 pieces, so that is 350 slices of pizza. Typical Pizza is sliced up in 8 pieces so divide 350 slices by 8 = 43.75 round up 44 pizza's total. Now for toppings that is entirely up to you. :)
if the pizza is round then you use Pi X 7.5 X 7.5
If it is cheese topping only, about 1500