Answer:
The weight difference of the two friends in a year= 36.93kg
Explanation:
Step 1
First calculate the difference in calories for lunch by subtracting total calories of friend 1 and 2:
Difference in calories=(total calories of lunch of friend 1) - (total calories of lunch of friend 2)
=1600-800
=800 cal/day
Step 2:
Now calculate the weight difference between both friends after 1 year by using the formula:
weight difference= yearly calorie difference ÷ energy of fat content
=(800×360/33100)
=8.82
1 food calorie= 4.1868kJ
=8.82*4.1868
=36.93kg