It takes 69 inches of ribbon to make a bow

and wrap the ribbon around a box, as shown.
The bow takes 30 inches of ribbon. The width
of the box is 11 inches.
What is the height of the box?
Answer in units of inches.

1 answer

69 - 30 = 39 inches of ribbon is left for wrapping around. Let w be the width and h be the height.

2w + 2h = 39

You know what w is. Solve for h