Posted by Chitra on .
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.

Geometry 
drwls,
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