Writing Project 2:

A work word problem

If Adam and Beth would paint the room together, they would need 5 hours. If Adam and Cindy would paint it together, they would need only 4 hours. If Beth and Cindy would paint it together, they would need only 3 hours. How long do they need if all three work together?

Generalize this kind of problem for 4 persons, and solve this as well.

Erich Prisner, August 2003