Answer:
Day 5
Explanation:
OK so the question tells us that S ( Simba ) eats 1,300 calories per day and will gain 100 per day and C ( Cuddles ) eats 2,700 calories per day and will loose 180 per day. Because of this Day 1 will be S = 1400 and C = 2520 you will keep going with this method until you reach Day 4 where S = 1700 and C = 1980 then at day 5 they will both be eating 1800 calories per day.
Thank you and have a nice day
Btw Cuddles was a bit of a chunky boi in the beggining.