Slow But Steady

The water was slowly draining out of a swimming pool. After one hour, Carla noticed that the water level was at the 5-foot level. After five hours, Carla noticed the water level had decreased to the 3-foot level. She wondered:
  1. What was the level of pool before it started draining?
  2. How many hours will it take the pool to completely drain?
Adjust the sliders below to create a model to help her answer her questions. Then click on the Simulation box to see if you are right!