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GATE CSE 2024 Session 1 Q8: Grams of fat from a pie chart of a 2,000 kcal diet

Question

The pie chart presents the percentage contribution of different macronutrients to a typical 2,000 kcal diet of a person.

The typical energy density (kcal/g) of these macronutrients is given in the table.
MacronutrientEnergy density (kcal/g)
Carbohydrates4
Proteins4
Unsaturated fat9
Saturated fat9
Trans fat9
Pie chart 'Macronutrient energy contribution': Carbohydrates 35%, Proteins 20%, Unsaturated fat 20%, Saturated fat 20%, Trans fat 5%
Tap the figure to enlarge

The total fat (all three types), in grams, this person consumes is

Try it: multiple choice: exactly one correct option

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Wrong answer costs 2/3 mark in GATE.
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Answer: C (official GATE 2024 final answer key)

Concept used: Energy share divided by energy density gives mass.

First step: All fats together are 45% of 2,000 kcal, and every fat gives 9 kcal per gram.

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Source: official GATE 2024 Session 1 CS question paper and final answer key, organised by IISc Bangalore. Question paper · Answer key

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