Answer: Will is taller by 3 inches.
Explanation:
1. Since we know that there are 12 inches in a foot, and that Will is 6 feet and 5 inches tall, we can simply do 12 x 6, which is 72, plus 5, which is 77.
2. Now that we know that Will is 77 inches tall, we can tell that he is taller than his brother by 3 inches.