1. Közösség
2. Study Group
3. formulas for rate problems, and others.(share your own!)

Example problem: It takes 63 minutes for 6 people to paint 9 walls. How many minutes will it take for 5 people to paint 7 walls.  w1 = 9 walls t1 = 63 minutes p1 = 6 people Q = time needed for one...