A painter is considering using a new high-tech paint roller.
Using the old methiod, the painter could complete three walls in
forty mintures. Using the new paint roller, two walls can be
completed in twenty-four minutes. Which methodolgy is more
productive?

old method: 5 walls/hour

none

roller method: .08333 walls/ minutes

roller method: 4.5 walls / hour

old method: .075 walls/ minute