An athlete consumes a light meal containing $10\text{ g}$ of carbohydrates, $5\text{ g}$ of proteins, and…
An athlete consumes a light meal containing $10\text{ g}$ of carbohydrates, $5\text{ g}$ of proteins, and $4\text{ g}$ of fats. If $1\text{ g}$ of carbohydrate yields $4\text{ kcal}$, $1\text{ g}$ of protein yields $4\text{ kcal}$, and $1\text{ g}$ of fat yields $9\text{ kcal}$, what is the total energy obtained from this meal?
$76\text{ kcal}$
$96\text{ kcal}$
$112\text{ kcal}$
$171\text{ kcal}$
Solution
Energy from carbohydrates is $10 \times 4 = 40\text{ kcal}$, from proteins is $5 \times 4 = 20\text{ kcal}$, and from fats is $4 \times 9 = 36\text{ kcal}$. Total energy $= 40 + 20 + 36 = 96\text{ kcal}$.