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25 October, 11:37

the approximate energy yield of carbohydrates is 4 calories/gram; fats yield about 9 calories/gram, and proteins about 4 calories/gram. Jack and Sarah consumed the following for lunch: Jack-100 grams protein, 20 grams fat, 75 grams carbohydrates; Sarah - 75 grams protein, 10 grams fats, 75 grams carbohydrates. How many Calories each did Jack and Sarah consume

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  1. 25 October, 15:04
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    Calories consume by Sarah 690 cal.

    Calories consume by jack 880 cal.

    Explanation:

    For jack

    Mass of carbohydrate = 75 g

    Mass of protein = 100 g

    Mass of fats = 20 g

    For Sarah,

    Mass of carbohydrate = 75 g

    Mass of protein = 75 g

    Mass of fats = 10 g

    Solution:

    The average calories content of

    Protein 4 cal/g

    Carbohydrate 4 cal/g

    Fat 9 cal/g

    Then,

    First of all we will calculate the calories consume by jack.

    100 g protein * 4 cal/g = 400 cal

    20 g fat * 9 cal/g = 180 cal

    75 g carb. * 4 cal/g = 300 cal

    Total calories = 880 cal

    Calories consume by Sarah.

    75 g protein * 4 cal/g = 300 cal

    10 g fat * 9 cal/g = 90 cal

    75 g carb. * 4 cal/g = 300 cal

    Total calories = 690 cal
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