Answer:
3.2.1. 15 cm is equal to 150 mm (since 1 cm = 10 mm)
3.2.2. To determine the number of boxes that can be tied together to form a bundle, we need to divide the thickness of the bundle by the thickness of each box. Thus, 15 cm (or 150 mm) divided by 8 mm is approximately 18.75. Since you cannot have a fraction of a box, the answer is 18 boxes.
3.2.3. To determine the number of bundles used to make one block of cardboard, we need to divide the height of the block (1.2 m or 1200 mm) by the height of each bundle (150 mm). Thus, 1200 mm divided by 150 mm is equal to 8. Therefore, 8 bundles are used to make one block of cardboard.