Answer: 20 meters.
Step-by-step explanation:
1. Keeping on mind the information shown in the figure attached and the similarity of both triangles, you can calculate the height of the tree (h) as you can see below:
[tex]\frac{3}{30}=\frac{2}{h}[/tex]
2. Now, you must solve for the height. So, you obtain the following result:
[tex]h=\frac{30*2}{3}\\h=20[/tex]
3. Therefore, the height of the tree is 20 meters.