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Question

A boy was interested in calculating the number of calories in his diet. He ate the following items in the diet.
ItemsWeight of each itemCarbohydrates (from rice)6 gPure Ghee8 gLignin3 gAlbumin5 gVegetable Ghee2 g
What is the total calories he is likely to have consumed (Kcal)?

A
161
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B
146
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C
122
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D
134
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Solution

The correct option is D 134
The physiological calorific value is the actual amount of energy liberated by the consumption of 1 gram of carbohydrates, fats and proteins.

The physiological calorific values for different nutrients are provided below.
CategoriesPhysiological calorific value (Kcal/g)Carbohydrates4.0Fats9.0Proteins4.0
Thus the total calories consumed by the boy in his diet can be calculated as follows:

Calories from carbohydrates = 6 × 4=24 Kcal
Calories from pure ghee =8 × 9=72 Kcal
Calories from lignin = 0 Kcal
Calories from albumin =5 × 4=20 Kcal
Calories from vegetable ghee =2 ×9= 18 Kcal
Total calories = Sum of the calories from all sources =24+72+20+18 = 134 Kcal

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