Answer: 91.

Solution: Let the height of the blue rectangle be $b$, the height of the red rectangle be $r$, and the height of the green rectangle be $g$. Then, according to the condition, $h+b-g=111, h+r-b=80, h+g-r=82$. Adding all these equations, we get $3h=273$, from which $h=91$.
8-3. Olya bought three gifts and packed them in three rectangular boxes: blue, red, and green. She tried to place these gifts in different ways: one on the table, and two on top of each other on the floor. Some distances are given in the diagram. Find the height of the table $h$. Express your answer in centimeters.

![](https://cdn.mathpix.com/cropped/2024_05_06_1421239a8d2e12a5ec5fg-02.jpg?height=668&width=1127&top_left_y=543&top_left_x=493)