Daryl is counting calories to manage his weight. For lunch he ate 45 grams of carbohydrates, 22 grams of protein and 16 grams of fat. How many calories did he consume?

412 calories

Explanation:

"Calories" are used to measure the amount of energy that people consume on a daily basis. This also allows a person to track his weight whether he's gaining or losing pounds off.

Take note that: 1 gram of carbohydrate = 4 calories

                          1 gram of protein = 4 calories

                          1 gram of fat = 9 calories

Next, is to get the amount of calories for each group.

45 grams of carbohydrates x 4 calories/grams = 180 calories

22 grams of protein x 4 calories/gram = 88 calories

16 grams of fats x 9 calories/gram = 144 calories

Then, you have to add all of them:

180 cal. + 88 cal. + 144 cal = 412 calories

Therefore, Daryl consumed 412 calories for lunch.

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