Answer:
20.3 ft
Step-by-step explanation:
The object-shadow ratio for the stick= 3÷1.5=2:1
The object-shadow ratio is same for all objects.
Let height of the tree be x
2/1 = x/10.15
x=10.15 * 2=20.3
So you multiply 2 1/3times 1 1/2 and you get 3 and 1/6
X axis should be first and then Y axis, So, the answer is (2,1)