it is Reading Break I am doubtful that I can contact my teacher before I need to know how to solve this.
The following is the question:
A light shines from the top of a pole that is 20 meters high. A ball is falling 10 meters away from the pole, casting a shadow on a building that is 30 meters away. When the ball is 25 meters from the ground it is falling at a speed of 6 meters per second. How fast is the shadow moving?
Side note: from left to right are the following, lamp, ball, wall with shadow.