A slice of cake contains 29.0 grams of fat,9.0 grams of protein,and 77 grams of carbohydrate.If swimming burns 1000.0 kJ/hour,how many minutes would it take to completely burn off the slice of cake? The respective fuel values for protein,fat,and carbohydrate are 17,38,and 17 kJ/g,respectively.
A)154
B)2.56
C)23.4
D)117
E)262

Question

Quizplus · Accepted Answer

The total energy content of the cake is calculated by multiplying the grams of each macronutrient by their respective fuel values: (29.0g fat * 38 kJ/g) + (9.0g protein * 17 kJ/g) + (77g carbohydrate * 17 kJ/g) = 1102 + 153 + 1309 = 2564 kJ. To burn 2564 kJ at a rate of 1000 kJ/hour, it would take 2564/1000 = 2.564 hours, which is approximately 154 minutes.

A Slice of Cake Contains 29