Answer:
The tree that is has a shadow that is 4.5 feet long is 2 feet long.
Explanation:
We are given the shadow of the tree = 9 feet long.
The height of the tree is = 4 feet.
Let us assume the tree with shadow 4.5 feet is h feet high.
Setting proportion now,
.
Plugging values, we get

On cross multiplication, we get
4×4.5=h×9
18=9h
Dividing both sides by 9, we get

h=2.
Therefore, the tree that is has a shadow that is 4.5 feet long is 2 feet long.