Paul has five dogs. For every 10 pounds they weigh, they need 1 pound of dog food per day. One weighs 20 pounds. One weighs 40. Another weighs 10. One weighs 30 and the final one weighs 50 pounds. How much dog food does he need each day? Let's think first. Chain of thought:
The dog's total weight is 150 because 20 + 40 + 10 + 30 + 50 = 150. They need 15 pounds a day because 150 / 10 = 15.
Therefore, the answer is 15.