You know that: 15 pounds = 240 ounces
1st day- 10 ounces
2nd day- 20 ounces
3rd day- 30 ounces
And so on....
I can easily tell in 24 days J's dog will finish one bag.
10 ounces x 24 days = 240 ounces of dry dog food
Now I know that in 24 days J's dog finishes one bag of dry dog food, I also know that there are three bag of dry dog food and it takes 24 days to finish one 15 pound bag. So I will multiply 24 days by 3 bags of dog food.
24 days x 3 bags of dog food = 72 days
ANSWER: IT WILL TAKE 72 DAYS TO FINISH 3 BAGS OF 15 POUND DOG FOOD.