Question

The top of a ladder slides down a vertical wall at a rate of 0.375 m/s. At the moment when the bottom of the ladder is 3 m from the wall, it slides away from the wall at a rate of 0.5 m/s. How long is the ladder?

Answer 1

5 meters. I don't know how I got the answer, so that's not going to help anyone in the long term. But the answer is 5 meters.