A pizza from a restaurant

Question

A pizza from a restaurant contains 10 grams of fat, 20 grams ofcarbohydrate and 15 grams of protein. How many Kcal of energy does this pizza contain?

Answer 1

Hello Natalie,
We will use the standard measurements that should be found in your textbook for the kcal/g for fats, carbohydrates, and protein: 

For fat.... 9 kcal/g
For carbohydrates.... 4 kcal/g
For protein..... 4 kcal/g

In order for us to be able to calculate the Kcal of energy in the pizza, we need to calculate the number of grams of fat, carbohydrates, and protein by the above measurements, and then we add that total together to determine the Kcal of energy from the pizza. 

10 x 9 = 90
20 x 4 = 80
14 x 4 = 60
___________
230 kCal of energy from the pizza