Final answer:
To make a 112cm tower, you would need 16 cups.
Step-by-step explanation:
To calculate the number of cups needed for a 112cm tower, we need to find the ratio between the height of the tower and the number of cups. Since it takes 4 cups to make a 28cm tower, the ratio is 4 cups / 28cm = 1 cup / 7cm.
Now we can use this ratio to find the number of cups needed for a 112cm tower. The calculation would be: 112cm * (1 cup / 7cm) = 16 cups.
Therefore, it would take 16 cups to make a 112cm tower.