Answer:
The actual height of birdhouse is 20 ft.
Explanation:
Let h be the actual height of birdhouse.
We have been given that a birdhouse has a shadow that is 12 feet long. Jin is 5 feet tall, and he is standing next to the birdhouse. Jin has a shadow that is 3 feet long.
Since proportion states that two fractions are equivalent, so we will use proportion to solve for the actual height of birdhouse.

Upon multiplying both sides of our equation by 12 we will get,



Therefore, the actual height of birdhouse is 20 ft.