I wanted to explore these 3-d puzzles from the webinar slides!
These problems are a little tricky to read. On the lower level, we have four quadrants. The 100 m^3 is the volume of the rectangular prism with the base labeled 40 m^2. This alone will help us solve for the missing measurement. What did you get?
Now things are getting a little more interesting. Before I write too much, I'd love to hear some ideas of how to solve this one.