Question

A 12-inch diameter pizza has 22 calories per square inch.
About how many calories are in the entire pizza?
Use 3.14 for pi.

Answer 1

Diameter = 12 inch
Radius = 12/2= 6 inch

Area of the pizza = πr^2 = 3.14 x 6 x 6
= 113.04 square inch

Calories of entire pizza = 113.04 x 22
= 2486.88 calories

Answer 2

Answer:

The number of calories in the entire pizza is 2486.88 calories.

Step-by-step explanation:

Given : A 12-inch diameter pizza has 22 calories per square inch.

To find : How many calories are in the entire pizza?  

Solution :

The diameter of pizza is d=12-inch

The radius of pizza is $r=\frac{12}{2}=6\ in$

The area of a circle is

$A=\pi r^{2}$

$A=(3.14)(6^{2})$

$A=113.04\ in^{2}$

According to question,

A 12-inch diameter has 22 calories per square inch

By proportion,

$\frac{22}{1}\frac{cal}{\ in^{2}}=\frac{x}{113.04}\frac{cal}{\ in^{2}}\\ \\x=22\times113.04\\ \\x=2486.88\ calories$

Therefore, The number of calories in the entire pizza is 2486.88 calories.