Carl is looking to buy a farm. While looking at a potential property, Carl wants to know the height of the silo. He measures a nearby tree to be 8ft. When he stands 25ft away from the silo and 2 ft away from the tree, he can see the silo in the distance. His eyesight is 5 ft 6in above the ground. What is the height of the silo?

make a sketch.

You will be able to construct similar triangles.
Remember that for two similar triangles, corresponding sides are in the same ratio