Jane consumed a breakfast that contained 85 grams of carbohy

Jane consumed a breakfast that contained 85 grams of carbohydrate, 20 grams of protein and 18 grams of fat. How many kilocalories did Jane eat at breakfast? Show your work.

Solution

The number of calories per gram of nutrients are mentioned as below:

1. Number of calories per gram carbohydrates: 4 calories/gram

2. Number of calories per gram proteins: 4 calories/gram

3. Number of calories per gram of fat: 9 calories/gram

Therefore, total number of calories consumed by Jane:

A. Total calories from carbohydrates : 85*4 or 340

B. Total calories from proteins: 20*4 or 80

C. Total calories from fats: 18 * 9 or 162

Thus, total number of calories consumed = 340 + 80 + 162 or 582 calories

Thus, these calculations show that Jane consumed a total of 582 calories or 0.582 kilo calories in her breakfast.