Respuesta :
Calories are the amount of energy the body receives after consuming food.
The runner has to eat 12 slices of pizzas to replenish the calories lost.
It is important to know that 1 kilocalorie = 1 calorie in nutrition.
- a) A runner runs for 5 hours and uses 830 cal/hr
The number of calories he expends is calculated as:
1 hour = 830 calories
5 hours = ?
Cross multiply
5 hours × 830 calories / 1 hour
= 4150 calories
The runner expends 4150 calories
Therefore, the runner expends 4150 calories after running for 5 hours.
- b) 1 piece/slice of pizza contains 19g of protein, 16g of fat, and 31g of carbohydrates.
1 g of carbohydrate = 4 calories
1 g of protein = 4 calories
1 g of fat = 9 calories
For 1 slice of pizza
Amount of protein
1 g of protein = 4 calories
19 g of protein = ?
Cross Multiply
19 g of protein × 4 calories
= 76 calories
Amount of Carbohydrate
1 g of Carbohydrate = 4 calories
31 g of Carbohydrate = ?
Cross Multiply
31 g of Carbohydrate × 4 calories
= 124 calories
Amount of Fat
1 g of fat = 9 calories
16 g of fat = ?
Cross Multiply
16 g of fat × 4 calories
= 144 calories
Hence, the total number of calories in 1 slice of pizza is calculated as:
76 calories + 124 calories + 144 calories
= 344 calories
So, if the runner expends 4150 calories after running for 5 hours, the number of slices of pieces of pizza the runner can eat to replenish is calculated as:
344 calories = 1 slice of pizza
4150 calories = ?
Cross Multiply
4150 calories × 1 slice of pizza / 344 calories
= 12.06 slices of pizza.
Approximately to the nearest whole slice of pizza is 12 slices of pizza.
Therefore, the runner has to eat 12 slices of pizzas to replenish the calories lost.
To learn more, visit the link below:
brainly.com/question/5465335
