Three boxes are stacked one on top of the other. One box is 2 feet 8 inches tall, one is 4 feet 7 inches tall, and one is 3 feet 11 inches tall. How high is the stack?

Question

Write your answer in feet and inches. Use a number less than
12 for inches.

Please explain

Answer 1

And your answer is?

Answer 2

9 feet 26 inches

now I'm trying to figure out the next step. I know 12 inches 1 foot

Answer 3

26 / 12 = 2 feet, 2 inches

9 ft, 26 inches = 11 feet, 2 inches