Alexandra decides to climb Mt. Krumpett, which is 5000 m high. She determines that this will require a total of 1350 kcal of energy for the trip. For her food supply, she decides to take nutrition bars. The label states that each bar contains 50 g of carbohydrates, 10 g of fat, and 40 g of protein. How many nutrition bars does Alexandra need to take with her?
Alexandra requires a total energy of 1350 kcal for the climb by eating proteins, fats and carbohydrates the amount of calories per gram contributed varies. Proteins and carbohydrates - 4 calories per gram fats - 9 calories and gram This means that by eating the same mass of fats and proteins/ carbohydrats the calories gained from fats is higher. each bar contains; 50 g of carbohydrates - 4 calories/g x 50 g = 200 calories 10 g of fat - 9 calories/g x 10 g = 90 calories 40 g of protein - 4 calories/g x 40 g = 160 calories total amount of calories from 1 bar = 200 + 90 + 160 = 450 calories energy required = 1 350 000 calories bars required = 1 350 000/450 = 3000 alexandra should consume 3000 bars
