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72 ft
To find the height of the tree, you can set up a proportion using the height of the tree and the length of its shadow in relation to the height of the building and the length of its shadow.
Let x be the height of the tree:
x/144 ft = 160 ft/160 ft
x/144 ft = 1
x = 144 ft
So, the height of the tree is 72 ft.