Answer:
5 days.
Explanation:
We are told that one person has 3 dogs and each dog eats 2 pounds of food in one day.
Let us find amount of food needed for 3 dogs in 1 day by multiplying number of dogs (3) by amount of food eaten by one dog (2 pounds).


Now let us divide 30 by 6 to find the number of days available food will last.

Therefore, 30-pound bag of dog food will last for 5 days.