Answer:the large puppy weighs 63 pounds.
Explanation:
A vet weighs 2 puppies. The small puppy weighs 4 1/2 pounds. Converting 4 1/2 pounds to improper fraction, it becomes 9/2 pounds.
The large puppy weighs 42/3 times as much as the small puppy. This means that the number of pounds that the large puppy weighs would be
42/3 × 9/2 = 63